Me too.
File with configuration for all providers is updated.

From one side it should update your configuration during OS update if it's changed. But this file is updated manually on gitlab.

But it can be case like this:

Provider change configuration, no one change file on GitLab, you manually change apn configuration on your phone.
What OS should do during the next update?
Overwrite your configuration?

And you have to remember someone should update this file on gitlab and it's not happening very often.

Of course, we can make a thread about that on TJC and wait for Jolla reaction.