Hi there! I understand that the Dreamona app was working perfectly on your OnePlus 12, but now it crashes after about 8 seconds. That sounds frustrating, but I'm here to help you troubleshoot the issue.

Let's start with some basic steps:

1. Clear Cache and Data: Sometimes, clearing the app's cache and data can resolve crashes. You can do this by following these steps:
- Go to Settings on your OnePlus 12.
- Navigate to Apps & Notifications.
- Find and tap on Dreamona.
- Tap on Storage.
- Select Clear Cache and Clear Data.

2. Reinstall the App: If clearing the cache and data didn't work, try uninstalling and then reinstalling the Dreamona app:
- Go to the Play Store, search for Dreamona, and uninstall it.
- Once uninstalled, reinstall the app from the Play Store.

3. Check for Updates: Make sure your OnePlus device is running the latest software version. Sometimes, bugs in the operating system can cause app crashes. You can check for updates by:
- Going to Settings > System > System updates.

4. Free Up Space: If your device is running low on storage, it may impact app performance. Make sure you have enough free storage by going to Settings > Storage.

If you've tried these steps and the app is still crashing, it might be related to compatibility issues with the Snapdragon 8 Gen 3 chipset in your phone. This has been noted in user discussions regarding app crashes on the OnePlus 12 1.

Please go through these steps and let me know how it works out for you! Are you satisfied with the solution I provided?