Have the exact same issue, but only when using USB midi (hence you noticed when using as a midi controller, same here). After lots of trial and error I noticed it behaves normally from the midi DIN ports. Been back and forth with support about it, even swapped out a new board that they sent over, but issue remains. Must be a firmware thing, but sequential seems to not be able to replicate the issue. Contact support that you're having the same issue, would love to see a fix as well!