So I'm seeing some of the same issues that others have posted of. Today I tried to find a PS2 G scale engine that for some reason wasn't in the remote any longer. There were 2 other engines on the rails. A set of G scale SP PAs, and a Big Boy. After numerous attempts I finally got the PRR F3 engines added back into the remote (and the app). After many issues popped up though. I had the polarity switched wrong on the engines that were missing.
The Bigboy was originally on address #10. Using the DCS app, I kept trying to add the PRR F3s and the Big boy kept getting a new address? It happened three consecutive times! I'm not sure why the app felt like re-adding the bigboy that was already in the app? It couldn't add the PRR F3s with the switch in the wrong position. Why did it keep changing the Bigboy's address?
I had other issues too. I shut down the remote properly after a couple of derailments. Yet when I powered it up, different consists weren't in the active screen each time? Each time I had to find them and re-activate them.
There were more but I forgot them right now. It was a very bad day of trains. Stuff happened that has never happened.