extreme cpu usage

ever since the 1.16.0.59 beta,playing in one of my survival worlds makes my computer use extrem high cpu usage,around 100% and the fan is very loud,this issue happened after not playing on the world for 2-3 days,this doesn't happen with all worlds so I'm not sure how to reproduce.

 

EDIT:It happens in every single world now,fresh or not,the cpu usage goes on a roller coaster from 100% to 70% to 90% to 100 again as an example

EDIT EDIT:this should be fixed as it works fine as of 1.16.63 beta