Welcome! Lots of great people and info on this forum- I think you will find it very helpful. I have experienced a few minor glitches with ApplePlay with my iPhone 11; it will be connected and I will be listening to music via Spotify but the map won't load, and sometimes I will be connected but nothing will load and it will instruct me to check my iPhone. Usually I disconnect and reconnect from the K5 internal wifi and bluetooth and I am good.
I also found that the farther away I get from my home I think my iPhone cannot decide if it wants to stay connected to my home wifi network as the signal decreases as I get closer to my car, or if it wants to connect to my K5 wifi and bluetooth when I start my car's engine. It gets stuck between the two. The workaround is that I turn my wifi setting on my phone to off before I start my car, and once I pull away, then I turn it back on and it reconnects seamlessly.
I also found that the farther away I get from my home I think my iPhone cannot decide if it wants to stay connected to my home wifi network as the signal decreases as I get closer to my car, or if it wants to connect to my K5 wifi and bluetooth when I start my car's engine. It gets stuck between the two. The workaround is that I turn my wifi setting on my phone to off before I start my car, and once I pull away, then I turn it back on and it reconnects seamlessly.