diff --git a/CHANGELOG.md b/CHANGELOG.md
index 57ad2e32291..5e884d87116 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -53,6 +53,7 @@ Docs: https://docs.openclaw.ai
 - Telegram: remove the startup persisted-offset `getUpdates` preflight so polling restarts do not self-conflict before the runner starts. Fixes #69304. (#69779) Thanks @chinar-amrutkar.
 - Telegram: keep the polling stall watchdog active even when grammY reports the runner as not running while its task is still pending, so a rebuilt transport cannot leave `getUpdates` silent until a manual gateway restart. Fixes #69064. Thanks @LDLoeb.
 - Subagents: fall back to direct completion delivery when the parent announce turn finishes without a visible payload, so child results still reach channel-backed requester sessions.
+- Subagents: tell parent agents to use `sessions_yield` while waiting for child completion events, preventing GPT-5 fast runs from ending silently after spawning workers.
 - Browser/Playwright: ignore benign already-handled route races during guarded navigation so browser-page tasks no longer fail when Playwright tears down a route mid-flight. (#68708) Thanks @Steady-ai.
 - Browser/CLI: lazy-load browser command groups and plugin runtime services so `openclaw browser --help` can render without loading the full browser automation stack. Fixes #65400. (#65460, #66640) Thanks @pandego and @Tianworld.
 - Browser/CLI: serve precomputed `openclaw browser --help` text from CLI startup metadata, avoiding the full plugin/config startup path for the common help invocation.
diff --git a/src/agents/subagent-spawn-accepted-note.ts b/src/agents/subagent-spawn-accepted-note.ts
index 02e3f435f50..a81340bf1c2 100644
--- a/src/agents/subagent-spawn-accepted-note.ts
+++ b/src/agents/subagent-spawn-accepted-note.ts
@@ -1,7 +1,7 @@
 import { isCronSessionKey } from "../routing/session-key.js";
 
 export const SUBAGENT_SPAWN_ACCEPTED_NOTE =
-  "Auto-announce is push-based. After spawning children, do NOT call sessions_list, sessions_history, exec sleep, or any polling tool. Wait for completion events to arrive as user messages, track expected child session keys, and only send your final answer after ALL expected completions arrive. If a child completion event arrives AFTER your final answer, reply ONLY with NO_REPLY.";
+  "Auto-announce is push-based. After spawning children, do NOT call sessions_list, sessions_history, exec sleep, or any polling tool. Track expected child session keys. If any required child completion has not arrived yet, call sessions_yield to end the turn and wait for completion events as user messages. Only send your final answer after ALL expected completions arrive. If a child completion event arrives AFTER your final answer, reply ONLY with NO_REPLY.";
 export const SUBAGENT_SPAWN_SESSION_ACCEPTED_NOTE =
   "thread-bound session stays active after this task; continue in-thread for follow-ups.";