Please try the following:
1. Connect to a different data network or WiFi to see if the issue persists.
2. Make sure you run the browser in a stable network environment.
3. Clear all background applications to ensure your phone has enough running memory.
4. Restart your phone and open the browser again to check there is enough memory.
5. Open the App Settings, clear the browser's cached data, and then open the browser. Note that data will be lost after the browser clears the cache, so back up any important data before clearing.
If the issue persists, contact the Nothing Support Team for further assistance.