Hi there! I understand you're having issues with Jami not sending or receiving messages, and that sent messages aren't showing up in the chat history. Let’s work through this together.

First, could you please let me know if you’ve noticed any specific patterns with the message delivery, such as issues with certain contacts or under specific network conditions? Knowing this can help narrow down the problem.

In the meantime, here are some steps to troubleshoot the issue:

1. Check Your Network Connection: Make sure your device is connected to a stable internet connection. You can try switching between Wi-Fi and mobile data to see if that resolves the issue.

2. Restart the Jami App: Close the Jami app completely and then relaunch it. This can often resolve temporary glitches.

3. Clear App Cache:
- Go to your device's settings.
- Tap on Apps or Application Manager.
- Find Jami in the list and tap on it.
- Tap on Storage, then select Clear Cache.

4. Update the App: Ensure that you have the latest version of Jami installed. You can check for updates in the Google Play Store.

5. Disable VPN or Proxy: If you're using a VPN or proxy, try disabling it temporarily, as these can sometimes interfere with Jami's ability to connect and function properly.

6. Check App Permissions: Make sure Jami has the necessary permissions enabled:
- Go to your device settings, then to Apps.
- Select Jami and check that permissions such as Storage and Network are allowed.

If these steps don't solve the problem, there might be a wider connectivity issue or a server outage. In that case, you can visit the Jami forums for more insights or potential updates. You can check out some relevant discussions about similar issues here: Jami Forum - Sporadically do not receive messages and Jami Not Receiving Messages When Using Some Networks.

Are you satisfied with the steps provided so far, or do you need further assistance?