Hi! I see you're having trouble with Session messages not going through or syncing. Let's get this sorted out.

To help me understand better, can you tell me a bit more about your situation?
- Are messages failing to send at all, or do they send but don't appear synced across your devices?
- Are you using Session on multiple devices, or just one?
- Have you noticed any error messages or notifications when this happens?
- Also, are you running the latest version of the app?

Meanwhile, here are some general steps that often help resolve sending and syncing issues on Android:

1. Check App Version: Make sure your Session app is updated to the latest version. Updates often fix bugs affecting messaging.

2. Internet Connection: Ensure you have a stable internet connection. Sometimes flaky Wi-Fi or mobile data can interrupt message delivery or syncing.

3. Restart the App: Close the app completely and reopen it. This can refresh its connection to the servers.

4. Clear Cache: On Android 10 with WebKit browsing engine, go to Settings > Apps > Session > Storage > Clear Cache. This removes temporary files that may cause issues without deleting your messages.

5. Check Background Data Permissions: Make sure Session can run in the background and use data unrestricted. Sometimes battery saver or data saver modes block syncing.

6. Re-login: If you have multiple devices or persistent syncing issues, logging out and back in can reset session permissions.

If none of these work, please let me know more about your symptoms, and we can try some deeper troubleshooting steps or check if there's an ongoing server-side issue.

Looking forward to your reply!