Jenkins Github Multi branch keeps rebuilding all PRs at repository scan

[Dan Tran]

Hello

I have a Jenkins BitBucket Multi branch pipeline successfully migrated to Github. Things are working greats except all PRs are rebuilt at each schedule team repo scan ( one a day for us ) or a manual trigger of a repo scan

An example of scan log show this entry

Checking pull request #7 Waiting for GitHub to create a merge commit for pull request 7. Jenkinsfile’ found Met criteria 

Changes detected: PR-7 (7f6f5c1d764af0f92dde39c438d45d887e9c7aea+6967c04e7f589b02888ca04083ed9956902b7781 (890a93de0b4fa6b3a0817d14feb6aaaf74724426) → 7f6f5c1d764af0f92dde39c438d45d887e9c7aea+3f1f42546f81fa354df282d5c8c12b041e36596f (cde2ae0f2484cc75e8b588976db6463f70680c3f)) 

Scheduled build for branch: PR-7

Web search does not show related issues like this, and I hope this group may have some insight

Have you seen this issue in your pipeline before?  and how did you fix it?

Thanks