4.x: Try to fix parallel testng failures

[akarnokd]

Sometimes they fail locally with a timeout on subscribe() which I don't understand as we don't delay subscribe, especially not for 50ms.

Resolves #8036

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 4.995 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_pr.yml: 4.928
.github/workflows/gradle_snapshot.yml: 5.051
build.gradle: 5.005

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 4.995 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_pr.yml: 4.928
.github/workflows/gradle_snapshot.yml: 5.051
build.gradle: 5.005

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (4.x@4151bfa). Learn more about missing BASE report.

Additional details and impacted files

@@          Coverage Diff           @@
##             4.x    #8067   +/-   ##
======================================
  Coverage       ?   99.28%           
  Complexity     ?     6829           
======================================
  Files          ?      764           
  Lines          ?    48246           
  Branches       ?     6470           
======================================
  Hits           ?    47903           
  Misses         ?      211           
  Partials       ?      132           

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