i think i know how to fix it.
Just need to set static dif

minexmr.com is the first pool where i should do that
I'll report tomorrow about results. If it doesnt help then i'll be forced to disable devfee.
Actually yeah, I just remembered, I did have to set static diff for minexmr! Just checked my bat files and the cpu one has "+20000" appended to the worker name, while the gpu ones have "+100000". Not even sure now why I had to add these back then, but it might help you as well.