pipeline trigger twice when push to remote

Summary

pipeline trigger twice on the same commit pushed to gitlab.com

Steps to reproduce

run git push 4 times on the same branch(within 3 minutes) then pipeline trigger 5 times(there is a commit that trigger 2 pipeline)

What is the current bug behavior?

push 1 commit trigger 2 pipeline

What is the expected correct behavior?

push 1 commit trigger 1 pipeline

Relevant logs and/or screenshots

Output of checks

This bug happens on GitLab.com