HUGE Problem with editorial processes

Description of issue or problem I’m having:
Hi! We have a site for multiple journals on OJS Last friday we experimented a problem with one of the journals (at the moment just one) which starts editorial processes automatically for old articles without sending any emails. It seems really strange to us. We change the password of the admin account and we are trying to find more information about the problem. Does anyone experience something similar or do you know what is the problem? Any idea will be aprecciated.

What I tried to resolve the issue: Change the admin password

Application Version: OJS