A couple of days ago Working Copy has been updated on my iPhone. After
that it complained that it could not find the local git repository
whenever I tried to add a new file. The contents of the new file
vanished of course and I could not even delete the empty file. However
I could successfully pull.
Yesterday I updated to iOS 13.3 and the issue magically ceased to
exist. Or did the device restart the trick? I do hate this kind of
dark magic... Everything just gets more complex each day.