I don't fully understand what this bug is about from the short description, but we hit an issue that might be related - build statuses suddenly stopped showing up in Bitbucket. Triggering builds on events such as PR created still works, but the build status doesn't propagate back to Bitbucket.
Versions:
- Bitbucket: 8.19.10
- Jenkins: 2.480
- Bitbucket Server Integration: 4.1.0 / 4.1.1
Downgrading to 4.0.0 fixed the problem.
I can also confirm the regression using Bitbucket 7.10.1 with the following error: