E2EE mnemonic phrase not recognized in 3.30.7 - netxcloud hub 29.0.9 - "Error while decrypting. Wrong password?"

[damko]

⚠️ Before posting ⚠️

• This is a bug, not a question or an enhancement.
• I've searched for similar issues and didn't find a duplicate.
• I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
• I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

1. configure server-side encryption (Hetzner SAAS) using defaul encryption module. No home encryption
2. configure E2EE from linux nextcloud client Appimage 3.15.3
3. store mnemonic phrase
4. create and encrypt from linux client
5. install latest android client from f-droid 3.30.7
6. grant access to android client
7. go to settings and try to save mnemonic phrase

Expected behaviour

it should sync keys and accept mnemonic phrase

Actual behaviour

it syncs keys and it fails saying "Error while decrypting. Wrong password?"

Android version

15

Device brand and model

google pixel 7

Stock or custom OS?

Custom (explain in "additional information")

Nextcloud android app version

3.30.7

Nextcloud server version

29.0.9

Using a reverse proxy?

No

Android logs

No response

Server error logs

Additional information

android 15 on graphene os - no storage limitations - application installed in "work profile"

[MC-on-GH]

I encountered the same bug on the hardware & software configuration indicated below on an Android phone. My order of operations was the same as cited above: I activated file encryption on the Linux desktop client, and everything seemed to be working well until I tried to enter the mnemonic seed phrase into my NextCloud Files Android app. I VERY carefully tried typing the mnemonic into the text field, and I always received the same error message: "Error while decrypting. Wrong password?" Also, the NC Files app will NOT permit me to paste text into the field for entering the mnemonic seed phrase. I had to enter the seed phrase manually. After about 10 separate attempts, I realized it couldn't be a mnemonic typo issue.
OS Version: Android 14
OS API Level: 34
Device: oriole
Manufacturer: Google
Model (and Product): Pixel 6 (oriole)

[jec]

I have also followed the same actions as above and get the same behavior. It's not asking me for the mnemonic first but rather downloading keys first and asking for a password to decrypt.

Pixel 8 Pro running GrapheneOS build 2025021100 (Android 15)
Nextcloud server 31.0.0
Nextcloud Android client 3.30.8

EDIT:

When I first launched the Android app after configuring E2EE on the Linux client, the app presented its own mnemonic, so I clicked Cancel. From then on, the E2EE option in Settings showed that E2EE had already been set up on a different client.

[Olareanu]

I have encountered the same issue, on a different hardware configuration:

• Samsung Galaxy S21FE
• Android 14 with One UI 6.1
• Nextcloud Android app 3.31.0

I'm underlining that I am also using the Hetzner "Storage Share" SAAS