[PROBLEM] No more display after in-place update

[Nutul]

It assumes that only one userid exists on the system and thus simply uses the first entry in the output of ls /home/

I'm going to make a wild guess that the OP's player has a /home/pi directory (for one reason or another) and that the default username he chose (in rpi-imager or elsewise) sorts higher than "pi".

Actually, "tux" is higher than "pi"... Thing is, how did eventually the folder "pi" get there, assuming he set the username through the installer.