[ISSUE #9914] Simplify isolation logic when updating fault item in sendKernelImpl

[yx9o]

Fixes #9914 .

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 49.69%. Comparing base (89e021e) to head (fc3e160).

Files with missing lines	Patch %	Lines
...mq/client/impl/producer/DefaultMQProducerImpl.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9915      +/-   ##
=============================================
- Coverage      49.78%   49.69%   -0.10%     
+ Complexity     12722    12699      -23     
=============================================
  Files           1314     1314              
  Lines          93928    93926       -2     
  Branches       12049    12049              
=============================================
- Hits           46765    46677      -88     
- Misses         41464    41530      +66     
- Partials        5699     5719      +20     

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