I had a problem with funds from eXch at a local exchange, but after a short communication, I got a refund. Yes, the reason for closing the order and freezing the funds is that part of the coins in my address are linked to the 'hack'. I think I also warned here about the potential risk.
This happened to me as well, not too long ago. The exchange had no problem accepting funds from eXch before the Bybit incident but afterward its a whole nother story. There were 2 silly things about this:
1) I received the funds from eXch before the Bybit hack, they just sat there for over a year, but since the eXch Ethereum address is marked/blacklisted, any funds sent at any time from them are considered "illicit."
2) The exchange accepted the deposit and immediately moved the funds to their hot wallet, all the while accusing me of having tainted funds. I pointed out to them that now their address was tainted as well. But it doesn't work like that I guess, as illicit funds received by a regulated exchange are now clean again (so long as they didn't come from a hacked exchange).
So they did end up issuing me a refund as well. They told me to be more cautious in the future, and I just accept it -- what's the point of arguing with them.