uRemote app quit working to start/stop recordings on iphone6 and ipad both

You’ve probably checked on this, but just a thought. Do you have an internet connection on the uTrack’s newtork?
I’ve run into some behavior I experienced as remote control apps failing to respond but was actually the iOS device switching wireless networks to favor one with an internet connection.

If the network your uTrack-X32 is connected to doesn’t have internet, an iOS device will sometimes spontaneously disconnect. If it does that after you’ve launched uRemote, it would have the track listing but not be able to play.
Just double check in your settings that your iOS device hasn’t changed networks. On a cellular device, you might have to turn off cellular data to be sure.