just to confirm after I ran BitcoinCore 0.21.1 without any problems for the entire last week until the next transaction from Nicehash arrived yesterday.
After the crash and several attempts with the same error at the same position (program closes when synchronizing the Nicehash transaction without a message) I pushed v0.20.1 into the program directory, started it and synchronized everything without problems.
Then switched back to the current v0.21.1 and its up and running again.

If you are interested, you can have a look at the last two days below, don't think I need to comment again

Transaction from NH is:

Debug log:

I am currently running v0.21.1 and am waiting for a transaction from somewhere else.
Let's see if it goes smoothly...