having same issue with low difficulty on a few workers that are hashing over 4k. Worst part is that worker gets banned even though the server is still accepting work for suprnova.

On top of that, when the worker gets banned, it doesn't send an email of an idle worker. Tested by taking a worker not banned offline and still no email 1 hour later. Block emails come in just fine.

Edit. Low difficulty issue solved for me by using xmr and not xmr-us where issue existed. I'll test xmr-us. again tomorrow if xmr. remains stable.

Email notifications for idle workers seem still to not be working.

Edit2. Low difficulty share is only occuring during a DevFee (claymore) event and very rarely. But enough for occasional banning.