This issue will be fixed with out next release. Until then you need to make a small edit applied photo on the desktop side and let photo update on the server-side. Sorry for the trouble - Guido/ Lr Mobile QE
Hey Greule. This is what has been said on every forum since the beginning of 2020 that a "fix will be made in our next release/update." Please assure enough information makes it up the chain of command to tend to paying professionals burdened with this error. Thank you.