I encountered something very similar still in 1.21. My Allay always try to fly up the tower in my house, but I have trapdoors each level. They just fly up into it, without end. A lead to pull them away, or an item to make them follow you usually works, but they consistently fly into the closed trapdoors as if they were open. I'd assume similar, cause, just a different manifestation.
MossyAether
I encountered something very similar still in 1.21. My Allay always try to fly up the tower in my house, but I have trapdoors each level. They just fly up into it, without end. A lead to pull them away, or an item to make them follow you usually works, but they consistently fly into the closed trapdoors as if they were open. I'd assume similar, cause, just a different manifestation.