The latest ARC beta is quite unstable for me. I had two complete playback crashes in one hour where after I open the app, the app completely freezes and crashes 5-10 seconds later. Playback queue is maintained though.
As I was writing this, the app again froze and crashed again within minutes of the previous crash. I just wanted to review my playback queue. The playback queue must be the issue here. I can confidently reproduce the issue by opening the app and clicking on the queue icon. ARC freezes and crashes 5 seconds after.
But in general the release seems a little undercooked. When I open the app the categories on the main page pop in and pop out before they are fully loaded in and the app is unresponsive in this time.