Orbit file timeout (March 2021)

Actually, snappy should use the same modules updates as SNAP does.

There was an issue with loading module updates, but this has been resolved:
[SNAP-929] Modules not loaded when snappy is not started from the system drive - JIRA (atlassian.net)

Maybe you have some old snappy code?
You could check and compare the code shown in the following post with yours:

You find the __init__.py in the snappy folder. Where it is located, depends on your installation settings.