After installing my 12.1" PX3 I've had a few issues. I wanted to see if anyone else may have experienced them as well and found a solution.
The most recent: the muti-window has stopped working. Before I was able to do split screen with almost any application. Now I can tap on it a million times, and it wont even open the muti-window view.
Also, the backup camera doesn't work, nor the seat heaters.