Help! iOS app "Not Connected"!

Newest firmware and app but OP-Z will not stay connected (BT) and disconnects immediately. Using USB-C it will connect but as soon as I change instruments it crashes?! Works fine on my old Android phone (S7).

I think that the latest iOS App needs the op-z to be on the latest Firmware (1.2.38). I had the same happen to me until I upgraded the op-z, and now it works fine