My experience is the exact opposite. Each time my phone locks, the roon remote app on my iphone loses connection with roon sever running on a macbook pro. When I reopen the remote app I have to restart it to resume playback control. I'm not sure what's going on but the issue may be isolated to iOS. Roon seems to work fine when I use my second macbook pro as the remote. Minor nuisance and not worth brain damage to open a ticket.
Roon is snappy responsive now
Applied latest version Roon server for windows and app on IPhone today. So far the annoying slowness in the user interface is no more. It’s very responsive and snappy now. Hope it stays this way.
Immediately prior I received a message from Roon containing an update on the Harmon acquisition and new product direction to focus more on its core user group of music lovers Audiophiles, etc. including focus now on application performance, which is paying immediate dividends. This is a great start so far and I hope they keep it up as promised.