[release/10.0] [browser][ws] fix race condition during message and close events #119085
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Backport of #118887 to release/10.0
/cc @pavelsavara
Customer Impact
This is rare race condition revealed in CI runs.
#117964
Regression
Probably since #96618
Testing
Automated tests on CI. This is very difficult to reproduce.
Risk
Low - just delay processing of the event until next browser loop tick.