Yes. Is it. Using Mackie. Uses MIDI IN and OUT 2. For clarity, have had this for a little over a year and not had any issues with stuck writes until a few weeks ago. There is nothing new installed with the exception of a couple of additional Spitfire Labs instruments.
As I use a Stream Deck and don’t really use the Transport control on the Keylab, do you want me to remove that profile and see if the issue goes away?