I did a usdt deposit two weeks ago, still not credited. So I used omniexplorer to see what happend to it. But the amount is stil on the balance of the address it was deposited.
I also deposited usdt two months ago to the same address, it was transfered immediately to another address and to another address and was credited to my funds after that.
So it seems the complete system stopped working, funds don't get stolen, but they are not processed anymore. To bad you can't undo a transaction....