App pool stops with various warnings like 5201, 5009, 5022 Etc. Rapid fail protection set to 5 occurrences, and 6th time app pool stops

Question

we are struggling in finding the root cause for App pool stop at IIS in randomn. Rapid fail protection settings below:

App pool stops after 5 warnings like below: (warning codes are different each time)

Happens only in one webserver out of two from a load balancer.

Most occurrences are during planned recycle times.