Just in case: pk3 is simple a zip file, so it can be opened with most archive-altering software, like 7-zip.
https://zdoom.org/wiki/Using_ZIPs_as_WAD_replacement
Hello from the chat.
It can be fixed by using ForceList as part of ListMenu instructions. Additionally, you’d want to increase line spacing to 18. Not sure if it’s a most elegant way to do that, but it works.
Result:
