Markus SeifertI found the bug description:
https://bugzilla.kernel.org/show_bug.cgi?id=218826
It seems as if this #Kernel driver bug is solved with kernel 6.8.10. My #linux_mint_22 is on 6.8.0. So I have to wait for an update and stick with the (annoying) workaround of the BIOS option to deactivate WIFI when plugging in LAN.