This is a bug I found both in Minecraft version 1.21.3 and 1.21.4, after interacting with a named villager it's name will linger on near blocks, like beds or even buttons, the only way to fix it is to destroy the block and replace it again.

If you need further details let me know, the bug is really annoying and I hope you can fix it someday :)

A named villager.

The bug in question.