Mirroring OB for KENWOOD

I installed this to connect my DMX125DAB car unit to my Sony Xperia L1. Only 4 stars because there is no screen message on the phone saying "ready to connect", and on first connection using the USB input on the car unit there is quite a delay with the car screen just blank - it would be easy to assume the connection isn't working. Once the connection is made the app works fine, allowing the phone to be used from the car unit touch screen. I installed a "set landscape" app to ensure the car display is always in landscape format and I use Android Auto to give me Satnav, music and phone all in one place. A point to note is that the park sensor function switches off the mirroring display when the handbrake is off. Kenwood UK advised me that this is a safety feature to prevent viewing moving images when the car is moving.. The installation diagram shows that the park sensor wire is earthed when the park brake is on and the park brake switch is closed.

I have downloaded the app and when I open it it does nothing and there is no buttons to navigate. Extremely disappointed as have spent a lot of money on the new stereo for the car and can't use all of the functions. Also reading through other reviews it seems I'm not the only one. Why have kenwood not responded to these reviews and fixed the app.

Hasn't worked for my Google pixel 4 since installed this afternoon. Heavily disappointed. Tried everything from reset, restart, updated software, uninstall reinstall, nothing works and it's highly frustrating because I've already paid for it and can't even send it back to swap it over. Going to contact Kenwood directly about this issue. The function is useless!