Dididice

Since I can’t reproduce it, I can only assume the problem is Steam is failing to update the files correctly.
 
Make sure build 41 is selected in the a Betas tab.
 
Do not use the reinstall feature.
 
Go to %ProgramFiles(x86)%\Steam\steamapps\common and delete the ProjectZomboid folder.
 
Verify the game in Properties -> Local Files.
 
If it still doesn’t work, rename the %username%\zomboid folder to zomboid_old and try starting fresh.

What all mods are you using? I see several additional texture packs such as NZTilePack, RussianRetecture .etc, but not the names of the mods themselves.
 
I'd assume a mod is interfering in some way with the drawing of the ListBox, so breaks spawn selection.