Problem with my iRig PRO and Tonebridge under iOS 14.3 on the iPad

I have a problem with the app Tonebridge in connection with the iRig PRO.

My iPad currently has iOS 14.3 installed and since then the app does not work properly. It happens very often that a connection to my guitar is displayed, but not directly via the iRig but the sound is taken from the built-in microphone. This causes delays and unusual reverb effects and it just sounds like shit. 

If I turn the microphone off internally for the app Tonebridge, then no sound comes at all.

With the app Garage Band it usually works and there it tells me as soon as I connect my iRig that I have to turn on the monitoring. then it usually works.

Have also tried it with an iRig PRO I/O because I thought my iRig is broken, but there is the same problem.

I never had a problem with older OS versions and my iRig always worked.

Sorry for my bad English...I use a translator.

Translated with www.DeepL.com/Translator (free version)