So when i have EntityCulling enabled, join the game and press f3 somehow my game crashes and i get this error:

The game crashed: unexpected error
Error: java.lang.IllegalStateException: Close the existing render pass before performing additional commands

it only crashes when i have the mod immediately fast

Send the full crash report. Without the stacktrace, mc version, mod version, mod loader etc. I can't say anything about this.

Closing as inactive and probably unrelated.