Comment from a user on curseforge. Probably that issue where the villager, being exactly 2.0 tall, can't walk through a door where there's a sliver of carpet right in front of it which raises their height to 2.1.

Or maybe it's referring to carpet stacked on top of carpet.

I'll investigate next weekend...

FYI: It's not your bug, but Mojang's. I'm running 1.19.4--waiting for you to get this updated to that BTW--and it's present there with vanilla villager. Of course, if you can fix it, that would be amazing.

If you do plan on fixing this (which it seems to already kinda be, I assume that's what the purple teleportation particles are for), I'd prefer to have that as a config option, because on my server we use double-layered carpets to prevent villagers from getting in/out of buildings.