Describe the bug

Exactly what it sounds like. My guess is it's because Nyf's makes them crawl along the surface of blocks, they are probably "crawling" along the underside of the block when they spawn, then getting stuck like that.

Steps to reproduce

1. Use Spawn Animations with Nyf's Spiders installed
2. Spawn any spider

Expected behavior

No response

Additional context

Nyf's Spiders mod

Since the spider was renamed to Grumm, I believe this to be a different issue. Did you install More Mobs v1.5 alongside the mentioned mods in Minecraft 1.20.3 or above?

Since I haven't heard back, I'll assume so. This should be fixed in v1.5.4 of More Mobs