My 4400 NEX has been doing a few odd things...it’s 2 years old. The first oddity is a tendency to change screens from what I left it last time...it begins playing, then there’s a period of several seconds where there’s no sound, then 80% of the time, it then plays (but the screen has changed)...the other 20% of the time, it will say that it can’t find my phone (iPhoneX, IOS 14.2)....
Sometimes, when it does this, I can go to “Bluetooth Audio”, and get it to play music, but Apple CarPlay isn’t connected....
I have gotten the “Software Error” message once, but that was several weeks