E2EE client not updated after E2EE reset on server

[JonasMayerDev]

⚠️ 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. Activate E2EE in android client / have it already activated and use it in android client to "cache/ save" the keys locally
2. Reset E2EE on the server (Settings -> Security -> End-to-end encryption)
3. Use the client E2EE encryption to encrypt for example a new folder

Expected behaviour

After step 3 should generate new key pair and should generate a new passphrase because E2EE was reset and keys on server were deleted

Actual behaviour

App uses local keys and not generates new ones as it should. The E2EE is on the server side not activated (eg. resetting is not possible anymore) but client behaves like it is activated.
Screen_recording_20240314_142803.webm
Explanation of the video: After 15 sec I reset e2ee, folder is deleted as it should be but encryption a new folder works fine while server has no e2ee keys

Android version

12

Device brand and model

Emulator

Stock or custom OS?

Stock

Nextcloud android app version

current master

Nextcloud server version

27

Using a reverse proxy?

I don't know

Android logs

No response

Server error logs

No response

Additional information

I think e2ee implementation is missing a check before doing anything to see if server still has e2ee keys and if they are the same as the local ones.