Reset "Acknowledge" when build is green again
When you have acknowledged a failing build (git branch) and the build turns green again it is still marked as acknowledged. You can right-click the green build and remove the "acknowledged check".
The "acknowledged status" should be resetted as soon as build turns green.
Not sure about the current side-effects but I would guess that you would not notice when build turns red again since it is still marked as acknowledged. Unfortunately this is not too easy to reproduce.
BR, Matthias