Hello,
We have dedicated project for one Client/User which raises a ticket when it's needed, but one day, out of a clear blue sky we started to receive massive number of duplicated messages.
It seems that this issue appeared after Jira Cloud Update on June 17 ~23:00 GMT:

We don't know what happened because no changes were made from our side, but on June 18 we started to receive this madness with multiply reply loop.
Sometimes one ticket generates additional ~200 new tickets:

And it is only first page of this kind of duplicates.
Content of each duplicated message looks like this:

What we tried:
- First time we tried to turn off only the "Automation" rule which is added to all tickets - still experienced the same behaviour;
- Second time we disabled all rules - still experienced the same behaviour;
- Also tried to change Users from which we receiving these ticket permissions - still experienced the same behaviour;
- Also tried play around with "Features", but still experienced the same behaviour;
It can be what client changed something, but still we want to check all available possibilities what could have caused it.
Please check it and give us advice on what else we can try.
Best regards
Rokas Kvedaras