For as long as I can recall, I’ve encountered this issue which I’ll summarize as follows:
In my garage, I jump in my truck and start playing an album. ARC is connected via a strong Wifi connection. The first song plays without issue. Before the first song ends, I start my drive.
Most of the time, the second song in the album/playlist will not start. ARC will just pause and I have to manually hit play on my phone to get it going again.
Is this expected behaviour?
This has affected others for a while:
I don’t think so because it doesn’t affect me 
To be clear, in my case I don’t think it’s an everyman case, as it were. I definitely have a dual stack home network, and my WiFi gets drops off sharply in my driveway, where there is also zero cell signal. On my drive, I have no cell signal at all for about 2 miles of driving. Then I pick up a cellular dual stack network. This particular combo doesn’t happen to a lot of people, so it’s not going to hit most folks, I surmise.
On the plus side, it can be a blessing living in a place with no cell signal. But that is off-topic…
Nonetheless, I wouldn’t want to call any of this “expected behavior” unless you like calling software feature deficits “expected.” It may, however, represent “current behavior” until it can be changed…