Airflow not loading DAGs after upgrading to 2.4.2 or higher

Question

I have perfectly configured Airflow v2.4.1 application working over Docker, which when upgraded to v2.4.2 or higher fails to load DAGs. I tried every possible solutions but no use.

When playing around with airflow.cfg file, considering the error shown, I found out that changing the log level from "INFO" to "ERROR" fixed the issue and all DAGs can be seen on UI also the rest is working fine.

I need to understand the root cause of the issue, so that I can fix it or raise a PR if required.

Details: Airflow version 2.5.0 40+ DAGs Docker image: debian11-0.0.4 Python version: python:3.9

Error:

File "/usr/local/lib/python3.9/site-packages/pendulum/tz/timezone.py", line 320, in _normalize
  dt = dt.__class__(
RecursionError: maximum recursion depth exceeded while calling Python object

I have tried updating the Recursion limit using sys.setrecursionlimit() to max 100000.