Linux web_long_running_tests_1_5 is 2.02% flaky

[fluttergithubbot]

The post-submit test builder Linux web_long_running_tests_1_5 had a flaky ratio 2.02% for the past (up to) 100 commits, which is above our 2.00% threshold.

One recent flaky example for a same commit: https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20web_long_running_tests_1_5/16134
Commit: 69c7fcb

Flaky builds:
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20web_long_running_tests_1_5/16134
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20web_long_running_tests_1_5/16124

Recent test runs:
https://flutter-dashboard.appspot.com/#/build?taskFilter=Linux%20web_long_running_tests_1_5

Please follow https://github.com/flutter/flutter/wiki/Reducing-Test-Flakiness#fixing-flaky-tests to fix the flakiness and enable the test back after validating the fix (internal dashboard to validate: go/flutter_test_flakiness).

[yjbanov]

The cause is highly likely to be the same as for #146189. Deduping.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.