thx for help
but I am the landlord and everything is OK with my hardware, software and internet connection.
It doesn't happen with everyone who rents our rig and, as I said, with Antpool/Nicehash etc. our rig runs 24/7
MRR Support wrote us, some new Renter (Joined last 3-4 Days MRR and create new Account) will be mine some new coin on instable pools
Well if you post in their discord maybe someone, perhaps an admin, will be able to troubleshoot why that's been happening.
If they said it's in relation to a new coin, it's likely some pools for this coin run with sub-optimal params.