Modpack version
Playing E2E-1.80, forge version 14.23.5.2847

Issue
Every time I leave the loaded areas in my world (ie. leave my base to gather resources) minecraft crashes. The areas I am flying around have previously been loaded, but most likely were not rendered while I worked in my base. The error seems to be a ticking entity error, but the mob involved changes between crashes (skeleton in the example, angus cow in another instance). The most recent crash log is below.

Logs
Two sample crash logs: https://pastebin.com/EEvicf00 and https://pastebin.com/9hPraw7m

Thanks for the report.
Please update to 1.81a and see if the issue persists.

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.