Task status reporting to Gerrit is broken ("Continuous Integration: Running")

Weird thing is happening with Coin or Gerrit - all integrating changes got "Continuous Integration: Running" comment, and after that can be staged again. However, integration continues running in the background, but it's status change won't be reported back again (at least, when such "zombie" task is manually aborted, no message is printed back again to Gerrit)

These changes in Gerrit were affected today (list may be incomplete):
https://codereview.qt-project.org/c/qt/qtwebkit/+/289122
https://codereview.qt-project.org/c/qt/qtwebengine/+/290492
https://codereview.qt-project.org/c/qt/qtwebengine/+/291481
https://codereview.qt-project.org/c/qt/qtwebengine/+/283463