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Android test-IME fill commits into a stale InputConnection session after focus moves to a new field #3052
Description
What happens
On an API 36 emulator under CPU load, fill into a freshly mounted, autofocused React Native TextInput sometimes fails with Android fill verification failed. The trigger is a wizard step change: Continue unmounts one field and mounts the next. The field keeps showing its hint: failureReason: text_mismatch, actual: "e.g. Jane", hintShowing: true, focused: true, and target and actual are the same node.
The test IME does commit, and logs commitText length=4. The app drops the text:
W/RemoteInputConnectionImpl: Session id mismatch header.sessionId: 0 currentSessionId: 1 while calling ...commitText
The helper's retry refocuses 2 s later and hits the same mismatch, so the IME was still on the previous connection session that long after focus moved.
Seen
- e2e mobile benchmark CI: 4 of 45 Android runs (
sequential onboarding echoes the exact values). - Locally: about 1 in 30 under load, 0 in 30 idle.
Tried
Waiting, before the commit, for dumpsys input_method's curEditorInfo.hintText to match the target's placeholder did not help (1/60 vs 1/30 baseline). The system-side editor info is already current when the IME's connection is stale.
Likely direction
Detect "text never landed" (hint still showing after the commit) and force a fresh startInput for the IME before the retry, e.g. by moving focus off the field and back, instead of re-tapping the already focused field. The check would live in fillAndroidImeHelper in packages/platform-android/src/text-input.ts.
Activity
harrisrobin commentedon Oct 4, 2026
I ran into this too: agent-device 0.21.11, an API 35 emulator (Pixel 7, Google APIs, arm64), entering a one-time code into a React Native
TextInputwithpressthentype.typereturns ok andAgentDeviceTestIMElogscommitText length=5, but the field stays empty, and typing again goes the same way while the field keeps focus. About 3 in 40 logins with screen recording running.Three things that may help with #3061:
typehas the same exposure and checks nothing, so the rebind on the fill path doesn't reach it. We now do the sameime disable/enable/setrebind ourselves before typing again.Session id mismatchline, so the drop is silent there.We're carrying #3061 (6622d34) as a local patch on 0.21.20 until it ships.