Midi in feedback sound

[3dog]

Feedback sound when using midi in. I am using a Mi.1 wireless Bluetooth transmitter powered by my EWI5000 and established connection via another app and then I open Thumbjam. All of the instruments with the exception of one guitar have a high pitch feedback tone in the back ground. Tried changing settings but nothing helped. The only way to get the feedback sound to stop is to toggle silence all but as soon as I play another note it comes back. The EWI works fine if I use it with the Music Studio app or the Korge M1 app on the iPad. The same thing happens on my iPhone 6 plus and the app crashes allot also. I have reinstalled but that doesn’t change anything. I used Thumbjam about a year ago with no problem.