I don't know if it's because of the current game version, but the paper nd wooden signs are being shown in a different tile than the ones they're being put in right now. ( Image for reference [imgur.com]).

I've uninstalled everything else to make sure it wasn't conflicting with anything and tried in a new save, changed my screen ratio since I usually play on ultrawide, same result either ways.
Sad it's not working as intented, the paper and wooden labels are super good for easy organization.