This miner is infected/hijacked, the nicehash worker the uses Hong Kong server is an old virus/trojan call it whatever you like, noticed that in your settings you used EU and U.S servers but on the status, it shows the HK one, whenever you try to change the settings and save, it will show saved but it won't get saved, flashing a different firmware won't be possible either, you have to Sdcard the miner or use another "more difficult" trick which I "invented" lol but it's stressful so start with a Sdcard first.

Also keep in mind that this spreads really fast, if you have other miners that use the same password like this one or have SSH enabled with its default password, chances are, they are already infected as well, you have to isolate this miner ASAP.