Possible Fixes

Yes

Modpack Version

10-0.43

What happened?

Persistent throughout all of the recent patches btw:
Warping to Journeymap waypoints will drop FPS to 1-10, and stay that way until either the world is reloaded, or the entire instance is reloaded.
Chunk generation seems to take a significant hit after warping, even if they were previously loaded

latest.log

https://gist.github.com/BLAKESTRFF/80dbb25350c04663bda631defe5ea63b

Developer reports

No response