fix: skip not stable case, and fix it in the future

[VineyAT]

• the case leads unknown error in CI. But it can't be reproduced in the local.

[codecov]

Codecov Report

Merging #11 (0dc2118) into master (5872ba1) will decrease coverage by 0.36%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
- Coverage   90.38%   90.01%   -0.37%     
==========================================
  Files          11       11              
  Lines         541      541              
==========================================
- Hits          489      487       -2     
- Misses         29       30       +1     
- Partials       23       24       +1     

Impacted Files	Coverage Δ
event.go	82.69% <0.00%> (-3.85%)	⬇️

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