Some items cannot be decrypted" on iOS/iPadOS

[NBrendel]

Operating system

iOS

Joplin version

13.5.3

Desktop version info

Joplin Mobile 13.5.3 (prod, ios)
Device: ios
Client ID: *****
Sync Version: 3
Profile Version: 49
Keychain Supported: No
Alternative instance ID: -
Revision: e75875c (release-3.5)
iOS version: 26.1
FTS enabled: 1
Hermes enabled: 1

Current behaviour

1. Open Joplin on iPhone or iPad
2. Navigate to Settings → Status
3. Warning banner appears: "Some items cannot be decrypted"
4. Status screen shows multiple items with "Error: Invalid property format"
5. Tapping "Retry All" does not resolve the issue — items remain undecrypted
6. Retrying from the macOS client also fails for the same items

Expected behaviour

All encrypted items should decrypt successfully on iOS/iPadOS,
consistent with behavior on macOS and Ubuntu clients where the
same notes sync and display correctly.

Logs

No response