Fix #3465: stop tab indicator animation glitch - #3969

Bugbot Analysis Progress (34s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (31s)
✅ Posted analysis results (0s)

Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_d5b85ba7-d906-4714-8f6c-ff72b85bebb4