Yes Stan. That's the dreaded message that pops up on the screen. "Controller disconnected. Please reconnect the controller to continue........OK"
Basically the screen goes blank with just the message showing. Can't click or do anything with the wheel control buttons or anything since no response. Can't click "OK", no response with back button, PS button, nothing. After a while I MAY be able to get a response from holding down the PS button in order to shut down. That's all.
Of course when the Controller Disconnection thingy happens all I know is that I would have had no control of the car and/or if on track it would have then ran off track smack into a wall or whatever rendering car undrivable anyway.
Such a bummer when that happens. And as stated previously:
1. Around the time before disconnection occurs I notice the PS4's fan roaring at quite a scary rate/loudness. This mainly happens with Projects Cars 2.
2. It hardly happens with Wreckfest. I could be in online session for a good 1-3 hours with no disconnection or loud fan from the PS4 console. If a disconnection happens it very rare and I could still reconnect the wheel by pressing the PS button.