You might want to check “Key Commands…” (under the file menu) to see if a key command has been assigned to “MIDI - MIDI Thru Active” (under Preferences) and as such accidentally can get triggered.
You might want to check “Key Commands…” (under the file menu) to see if a key command has been assigned to “MIDI - MIDI Thru Active” (under Preferences) and as such accidentally can get triggered.