Dear MSTDR,
I faced the same issue on yobit . They stole my 18,6 ETHs.
I tried to transfer from My ETH Poloneix wallet to my yobit ETC classic wallet.
it is in the air more than 500 days.

Dominingherzog , does not response, when I write a support message, they reply an automotic messega regarding replay attack topic.

did you find a solution ?