Logic Pro generating midi control messages when changing channel strips

Hey all,

I created an external instrument track and am sending midi out on my interfaces midi out port, channel 1, to a Novation Peak. Audio is coming back on inputs 1 and 2. If I create a midi section and play it, everything works fine.

However, if I ever change the channel strip away from the external instrument, a bunch of midi control messages are generated and sent to the synth, messing up its patch. Here's a video of the issue occurring:

https://youtu.be/yJ6cEeZvM5c.

I have no external midi reset messages set up (see pic below):

Does anyone have a guess as to what's happening? It's literally driving me mad.

Thanks!