Yeah the discord chat of powermining.pw brought me most far by now. -
https://discord.gg/epFf8bFThanks guys!
But it still accrues, the one got "fixed" by taking it out and plug it single in to a modem somewhere else.
Now it seems like a second one got "infected".
So i will watch out for a Switch witch can force 100fdx, is my last hope by now.
EDIT: Ok updating netowork settings kinda helped now for now, by pressing just update.