We are investigating job termination issues for some components. After termination request is accepted jobs remain in terminating state until finished.
UPDATE Nov 22, 9:28 AM (UTC) - We have identified the root cause and prepared the fix which should be released in few hours. Only minority of jobs termination was affected by this issue.
UPDATE Nov 22, 10:49 AM (UTC) - The fix was deployed and job termination is fully functional again for all jobs.