Older messages can`t be decrypted

[ripper81]

Describe the bug
In some chats older messages (posted with Element before Schildichat was installed) cant be decrypted. Schildichat is "waiting" for the key.
In other chat groups where the same person is posting all messages are visible without a problem.
The problem seems limited to the androidversion. Using the same account with the linux desktop verison of Schildichat works flawless. The problem is also present in Element. I switched to Schildichat for that reason.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
All posts should be visible, keys should be synced.

Screenshots
If applicable, add screenshots to help explain your problem.

Smartphone (please complete the following information):

• Device: Google Pixel 7a
• OS: Android 14

Additional context

• App version: [Look it up in Settings / Help & About. Click "Version" there to copy it. "Latest version" is not a valid version!]
• Store: Google Play
• Homeserver: matrix.org
• Related labs settings: None
• Logs have been submitted using the app's built-in bug report (/"rageshake") mechanism: no

Upstream relevance

• Does this issue exist in Element Android?
• If this issue exists in Element Android, please also link the corresponding bug report (create a new one if it doesn't exist yet)

Add any other context about the problem here.