Very minor, and likely a side effect of placing signs on walls making them a pillar. See screenshot as it should show it pretty well.
Environment
Vanilla 1.21.8 client
Linked issues
duplicates 1
Attachments
Comments 2
It's MC-192083, but no worries 🙂
Could not find a post mentioning this on a quick search, but I do apologize if there was one.