Indeed, we can reproduce the problem that the auto uploaded files were placed in the root of the Google Drive Cloud when deleting or moving away the folder chosen for auto upload.
There exists already a warning which will be displayed when this problem happens but the exists check fails in case of the auto upload and Google Drive and then the auto upload files will be placed inside to root of the cloud . We just fixed the problem.
So that these files could be easily decrypted again, you would have to copy them into the folder where they should be, which is not so easy because by renaming or deleting them you don’t know exactly which path the folder had in the cloud before…
The other variant would be our Sanitizer, but it doesn’t support vault format 7 yet because we want to integrate this tool directly into the Cryptomator application.
The easiest solution would be if you still have the pictures on your phone and could upload them manually again .
Sorry for the inconvenience, we have fixed the problem of the auto upload in Google Drive in version 1.5.8 and we will publish it ASAP. Thanks again for reporting this problem!