diff --git a/CHANGELOG.md b/CHANGELOG.md
index 094bcd182e4..ec5474bd7bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -45,7 +45,7 @@ Docs: https://docs.openclaw.ai
 - Plugins/tools: cold-load selected plugin tool registries when the active registry only has partial tool coverage, so wildcard-expanded allowlists no longer hide installed plugin tools from `tools.effective`. Fixes #76780. Thanks @lilesjtu.
 - Plugins/tools: compare cached and runtime plugin tool name conflicts with normalized core tool names, so case variants of core tools are blocked instead of leaking duplicate tool registrations. Thanks @vincentkoc.
 - Plugins/OpenRouter: advertise DeepSeek V4 thinking levels, including `xhigh` and `max`, through the runtime and lightweight provider policy surfaces so `/think` validation no longer rejects OpenRouter-routed DeepSeek V4 models. Fixes #74788. Thanks @vincentkoc.
-- Status/sessions: ignore malformed non-string persisted session provider/model metadata instead of throwing while rendering status summaries. Thanks @vincentkoc.
+- Status/sessions: ignore malformed non-string persisted session provider/model metadata instead of throwing while rendering status summaries. Fixes #76206. Thanks @vincentkoc.
 - CLI/config: remove only the targeted array element for `openclaw config unset array[index]` instead of replaying the unset during config write and deleting the shifted next element. Fixes #76290. Thanks @SymbolStar and @vincentkoc.
 - Plugins/voice-call: treat abnormal local Gateway close code 1006 as a standalone CLI fallback case, so `voicecall smoke` and related commands can still run the provider check path when the Gateway socket closes before returning a response.
 - Agents/tools: stop treating `tools.deny: ["write"]` as an implicit `apply_patch` deny; operators who want to block patch writes should deny `apply_patch` or `group:fs` explicitly. Fixes #76749. (#76795) Thanks @Nek-12 and @hclsys.
diff --git a/src/agents/model-selection-display.test.ts b/src/agents/model-selection-display.test.ts
index 47dcfd8b3c2..6671a5c4526 100644
--- a/src/agents/model-selection-display.test.ts
+++ b/src/agents/model-selection-display.test.ts
@@ -32,6 +32,18 @@ describe("model-selection-display", () => {
         }),
       ).toBe("anthropic/claude-sonnet-4-6");
     });
+
+    it("ignores malformed persisted model values instead of throwing", () => {
+      expect(
+        resolveModelDisplayRef({
+          runtimeProvider: { provider: "openai" },
+          runtimeModel: false,
+          overrideProvider: ["anthropic"],
+          overrideModel: 123,
+          fallbackModel: " openai/gpt-5.5 ",
+        }),
+      ).toBe("openai/gpt-5.5");
+    });
   });
 
   describe("resolveModelDisplayName", () => {
@@ -100,5 +112,21 @@ describe("model-selection-display", () => {
         model: "gpt-5.4",
       });
     });
+
+    it("ignores malformed persisted session model values", () => {
+      expect(
+        resolveSessionInfoModelSelection({
+          currentProvider: { provider: "openai" },
+          currentModel: false,
+          defaultProvider: "anthropic",
+          defaultModel: "claude-sonnet-4-6",
+          entryProvider: ["openrouter"],
+          entryModel: 123,
+        }),
+      ).toEqual({
+        modelProvider: "anthropic",
+        model: "claude-sonnet-4-6",
+      });
+    });
   });
 });
diff --git a/src/agents/model-selection-display.ts b/src/agents/model-selection-display.ts
index c6a8a6d29b9..3c13e3dc948 100644
--- a/src/agents/model-selection-display.ts
+++ b/src/agents/model-selection-display.ts
@@ -1,14 +1,16 @@
+import { normalizeOptionalString } from "../shared/string-coerce.js";
+
 type ModelDisplaySelectionParams = {
-  runtimeProvider?: string | null;
-  runtimeModel?: string | null;
-  overrideProvider?: string | null;
-  overrideModel?: string | null;
-  fallbackModel?: string | null;
+  runtimeProvider?: unknown;
+  runtimeModel?: unknown;
+  overrideProvider?: unknown;
+  overrideModel?: unknown;
+  fallbackModel?: unknown;
 };
 
 export function resolveModelDisplayRef(params: ModelDisplaySelectionParams): string | undefined {
-  const runtimeModel = params.runtimeModel?.trim();
-  const runtimeProvider = params.runtimeProvider?.trim();
+  const runtimeModel = normalizeOptionalString(params.runtimeModel);
+  const runtimeProvider = normalizeOptionalString(params.runtimeProvider);
   if (runtimeModel) {
     if (runtimeModel.includes("/")) {
       return runtimeModel;
@@ -22,8 +24,8 @@ export function resolveModelDisplayRef(params: ModelDisplaySelectionParams): str
     return runtimeProvider;
   }
 
-  const overrideModel = params.overrideModel?.trim();
-  const overrideProvider = params.overrideProvider?.trim();
+  const overrideModel = normalizeOptionalString(params.overrideModel);
+  const overrideProvider = normalizeOptionalString(params.overrideProvider);
   if (overrideModel) {
     if (overrideModel.includes("/")) {
       return overrideModel;
@@ -37,7 +39,7 @@ export function resolveModelDisplayRef(params: ModelDisplaySelectionParams): str
     return overrideProvider;
   }
 
-  const fallbackModel = params.fallbackModel?.trim();
+  const fallbackModel = normalizeOptionalString(params.fallbackModel);
   return fallbackModel || undefined;
 }
 
@@ -54,33 +56,39 @@ export function resolveModelDisplayName(params: ModelDisplaySelectionParams): st
 }
 
 type SessionInfoModelSelectionParams = {
-  currentProvider?: string | null;
-  currentModel?: string | null;
-  defaultProvider?: string | null;
-  defaultModel?: string | null;
-  entryProvider?: string | null;
-  entryModel?: string | null;
-  overrideProvider?: string | null;
-  overrideModel?: string | null;
+  currentProvider?: unknown;
+  currentModel?: unknown;
+  defaultProvider?: unknown;
+  defaultModel?: unknown;
+  entryProvider?: unknown;
+  entryModel?: unknown;
+  overrideProvider?: unknown;
+  overrideModel?: unknown;
 };
 
 export function resolveSessionInfoModelSelection(params: SessionInfoModelSelectionParams): {
   modelProvider?: string;
   model?: string;
 } {
-  const fallbackProvider = params.currentProvider ?? params.defaultProvider ?? undefined;
-  const fallbackModel = params.currentModel ?? params.defaultModel ?? undefined;
+  const fallbackProvider =
+    normalizeOptionalString(params.currentProvider) ??
+    normalizeOptionalString(params.defaultProvider) ??
+    undefined;
+  const fallbackModel =
+    normalizeOptionalString(params.currentModel) ??
+    normalizeOptionalString(params.defaultModel) ??
+    undefined;
 
   if (params.entryProvider !== undefined || params.entryModel !== undefined) {
     return {
-      modelProvider: params.entryProvider ?? fallbackProvider,
-      model: params.entryModel ?? fallbackModel,
+      modelProvider: normalizeOptionalString(params.entryProvider) ?? fallbackProvider,
+      model: normalizeOptionalString(params.entryModel) ?? fallbackModel,
     };
   }
 
-  const overrideModel = params.overrideModel?.trim();
+  const overrideModel = normalizeOptionalString(params.overrideModel);
   if (overrideModel) {
-    const overrideProvider = params.overrideProvider?.trim();
+    const overrideProvider = normalizeOptionalString(params.overrideProvider);
     return {
       modelProvider: overrideProvider || fallbackProvider,
       model: overrideModel,
diff --git a/src/agents/model-selection.test.ts b/src/agents/model-selection.test.ts
index c51c7bf0890..58db9f310cf 100644
--- a/src/agents/model-selection.test.ts
+++ b/src/agents/model-selection.test.ts
@@ -389,6 +389,18 @@ describe("model-selection", () => {
         model: "kimi-code",
       });
     });
+
+    it("ignores malformed persisted model fields and tolerates a missing default provider", () => {
+      expect(
+        resolvePersistedModelRef({
+          defaultProvider: undefined,
+          runtimeProvider: { provider: "openai" },
+          runtimeModel: false,
+          overrideProvider: ["anthropic"],
+          overrideModel: 123,
+        }),
+      ).toBeNull();
+    });
   });
 
   describe("resolvePersistedOverrideModelRef", () => {
@@ -416,6 +428,16 @@ describe("model-selection", () => {
         model: "kimi-code",
       });
     });
+
+    it("ignores malformed persisted override fields", () => {
+      expect(
+        resolvePersistedOverrideModelRef({
+          defaultProvider: undefined,
+          overrideProvider: ["anthropic"],
+          overrideModel: 123,
+        }),
+      ).toBeNull();
+    });
   });
 
   describe("resolvePersistedSelectedModelRef", () => {
diff --git a/src/agents/model-selection.ts b/src/agents/model-selection.ts
index 58e6abcb7ea..aecba082ad1 100644
--- a/src/agents/model-selection.ts
+++ b/src/agents/model-selection.ts
@@ -81,13 +81,17 @@ export {
 };
 export { isCliProvider } from "./model-selection-cli.js";
 
+function normalizePersistedDefaultProvider(value: unknown): string {
+  return normalizeOptionalString(value) ?? DEFAULT_PROVIDER;
+}
+
 export function resolvePersistedOverrideModelRef(params: {
-  defaultProvider: string;
+  defaultProvider?: unknown;
   overrideProvider?: unknown;
   overrideModel?: unknown;
   allowPluginNormalization?: boolean;
 }): ModelRef | null {
-  const defaultProvider = params.defaultProvider.trim();
+  const defaultProvider = normalizePersistedDefaultProvider(params.defaultProvider);
   const overrideProvider = normalizeOptionalString(params.overrideProvider);
   const overrideModel = normalizeOptionalString(params.overrideModel);
   if (!overrideModel) {
@@ -109,14 +113,14 @@ export function resolvePersistedOverrideModelRef(params: {
  * Use this when callers intentionally want the last executed model identity.
  */
 export function resolvePersistedModelRef(params: {
-  defaultProvider: string;
+  defaultProvider?: unknown;
   runtimeProvider?: unknown;
   runtimeModel?: unknown;
   overrideProvider?: unknown;
   overrideModel?: unknown;
   allowPluginNormalization?: boolean;
 }): ModelRef | null {
-  const defaultProvider = params.defaultProvider.trim();
+  const defaultProvider = normalizePersistedDefaultProvider(params.defaultProvider);
   const runtimeProvider = normalizeOptionalString(params.runtimeProvider);
   const runtimeModel = normalizeOptionalString(params.runtimeModel);
   if (runtimeModel) {
@@ -146,7 +150,7 @@ export function resolvePersistedModelRef(params: {
  * overrides before falling back to runtime identity.
  */
 export function resolvePersistedSelectedModelRef(params: {
-  defaultProvider: string;
+  defaultProvider?: unknown;
   runtimeProvider?: unknown;
   runtimeModel?: unknown;
   overrideProvider?: unknown;
@@ -171,11 +175,11 @@ export function resolvePersistedSelectedModelRef(params: {
 }
 
 export function normalizeStoredOverrideModel(params: {
-  providerOverride?: string | null;
-  modelOverride?: string | null;
+  providerOverride?: unknown;
+  modelOverride?: unknown;
 }): { providerOverride?: string; modelOverride?: string } {
-  const providerOverride = params.providerOverride?.trim();
-  const modelOverride = params.modelOverride?.trim();
+  const providerOverride = normalizeOptionalString(params.providerOverride);
+  const modelOverride = normalizeOptionalString(params.modelOverride);
   if (!providerOverride || !modelOverride) {
     return {
       providerOverride,