EXTREME lag on snapshot 20w22a

When joining a world on 20w22a the game is very laggy (about 3-4 fps). However if i join that same world on other versions (tested on 20w22a, 22w21a, and 1.15.2) i get about 40 fps (witch is pretty average for my pc). I have not tested this on any servers because i don't know any that support the current version.

What I expected to happen was...:
The fps should not be so low when joining a world on the newest snapshot.

What actually happened was...:
The fps was 3-4 when it should have been around 40

Steps to Reproduce:
1. Join any world on any version besides 20w22a
2. Join the same world on 20w22a
3. The fps should have a very significant drop