[ BUG ] Last database setting + keyfile forgotten when opening with (password+keyfile+keepassXC challenge-response)

[Alinus63]

Previously, I always used a KeepassXC (kdbx v4.0) database with password+keyfile, with keyfile imported in app private folder of KP2A. KP2A always remembered last database setting + keyfile location next time I opened it.

I bought a Yubikey recently and set it up succesfully with KeepassXC (all platforms linux, Windows & macOS), same database. Using KP2A with ykDroid, I am also able to open it successfully, however once I close KP2A, next time I open the app it defaults to "password only" but more importantly, it has forgotten the keyfile location. Whatever the setting (password + whatever), the location is lost and I have to input it again. This is a major issue for keyfile imported in app private folder as I have to import it again.

What I find, using a Yubikey with HMAC-SHA1:

• All settings are always remembered for "password+keyfile";
• The file location and "password+keyfile+KeepassXC challenge-response" settings are lost when I open a database successfully, as soon as the app is closed: it defaults back to "password" and file location is permanently lost;
• QuickUnlock works succesfully for same settings, as long as app is not closed;
• I then have to import the keyfile again - when imported to the app private folder, the trailing index of stored imported keyfile increases automatically (e.g. KP, KP1, KP2,... as the file name), suggesting copies of the same keyfile are added every time.

I tried to add storage permission to the Android app, to no avail.

Please help, as reimporting the keyfile everytime is not possible to use: either presents a security risk if keyfile is in generic file directory, either need to reinitiate the import in private app folder (not possible when in the field).

KP2A version: latest (1-08b-r1)
Android 10 (Samsung Galaxy Note 9 with latest update 1 Sep)

[Alinus63]

Additional details after further testing:

• Works correctly when using just "password+KeepassXC challenge-response"

• It seems as though behaviour of forgetting keyfile path when opening / attempting to open same database with different settings (e.g. "password+KeepassXC challenge-response") is "normal", and it is not a problem in most cases as both database + settings are both remembered after next close / open app.

• The issue is that in the case of opening with setting "password+keyfile+KeepassXC challenge-response", next time the app is closed / opened it will default back to "password" setting and hence keyfile location is forever forgotten (and can no longer be retrieved).

This is an issue (and most likely a bug) as it becomes impossible to reopen the database: keyfile must be imported again.