No this is “normal” and is due to the fact that during the normal unlock of a vault from the vault list, we load the masterkey file from the cloud in the background while entering the password or biometric credentials. As already described in the other thread, this first request will refresh the token of Onedrive, which requires UI and which is why we have to close the biometric auth dialog again. Somehow your device has a problem with closing the biometric auth dialog. Is it possible sometimes or never to unlock the vault (I mean directly after the fresh start, if Cryptomator has already communicated with Onedrive it is possible in any case…)?
We do not load the masterkey file in the background unlocking while “sharing” with Cryptomator and therefore the problem does not occur in this scenario.