How to setup MG3b + GP5 + LoopBe? Feedback Issue

Anyone using LoopBe1 as internal MIDI?
AFAIK i’m not purposely connecting MIDI out and IN, LoopBe keep muting and giving a Feedback error.

Goal:
Standalone MG3b LoopBe midi Out—>GP5 MIDI IN

First: I can confirm that this problem arises in exactly the same way with a) Studio one 7 and b) In Ableton Live 10 (this is the last version I have) on a Windows Machine.

Second (a solution…): Try TBE LoopMidi. On my machine this works without problems (including transmission of MPE, only in Studio One 7 of course), although the Program is really old…