I have a single Cryptomator vault hosted via OneDrive (Business) provider configured for the Files app multiple iOS devices (iPhone, iPad). However it seems after some time the vault in the files app will never unlock.
Opening the vault will prompt that an unlock is required, however a faceID unlock will just return to the prompt.
Disabling / Re-Enabling faceID unlock to prompt for the unlock key doesn’t work either. The only option is to remove the vault, remove the OneDrive provider (since Cryptomator can no longer access the provider) and re-add everything from scratch.
BoxCryptor iOS used to have the same problem; OneDrive login token would expire but would the app would just prompt to reauthenticate. I suspect something similar is happening here but since Cryptomator can’t just renew a login this whole rigmarole is required which makes it practically unusable.