Why does Red Rice note jump back to the home screen by opening the SMS and pressing the Set button?

I suggest you try the following methods:

After backup, try to clear the cache and user data during recovery. Methods: Press and hold the "Volume Increase Key" and then the "Power Key" when the power-on screen appears, and then let go to resume. Select simplified Chinese > clear data > clear cache+clear user data. Tip: The touch screen is temporarily disabled in the recovery state. Please confirm with the "Power Button" and select the "Volume Button".

If there are still problems after the above operation, it is recommended that you back up your system version and try again.