Stuck on a loop when processing events on develop

[mohammadranjbarz]

There was 36 Processing events but none of them we processing, so I restarted the application it went ok, but it stucked on one events so it was processing that event over and over so it was sending lots of email ( you milestone proposed, ...)
And after restarting redis it went ok (I guessed maybe our queue handler, bull stucks), but maybe I should spend sometime to find the cause.

you can check this log file in develop server
logs/combined-2021-08-21.log
( between 10AM-10:20AM logs)

[mohammadranjbarz]

I got an idea, wrote down here to not forget,

Maybe in event handler we should check the status of event in DB again, to not reprocessing multiple times