Entity animator doesn't show everything and fences are broken

When I ported my mod to 1.18 and tried to add entity models back, I've noticed that there is a major problem. When adding animations to model segments, the tab shows only the main segments, treating the children segments as if they didn't exist. showing only parent segment(s). This makes animating model troublesome if you want to add animated segment on top of another animated segment.

Another problem is with fences. Fences do not connect to each other for some reason.