My rigs are going nuts this morning as well. My stale shares are 4x their usual and where I was getting 1-4 invalids per day and now I have over 100 already today. All of my rigs are throwing the same number of invalids, where before one of my older rigs was the culprit.
When I checked pings to the pools I noticed my pings way higher than previously. Switched my rigs over to another network, same issue.
Yesterday, I lowered OC (mem from 2000 to 1900, core from 1100 to 1030), changed the pool url to the US East ones and my invalid shares rate hasn’t moved: I’m around 2.28 % still.
I have lowered them even more today. I’ll see what happens, eventually switching to Canada URLs later to day, stay tuned
Edit: After 4 hours with 1000 mhz core and 1800mhs memory, I dropped to 1,70% invalid shares on US East. I’m now going to shift back to EU hiveon pool adresses.