Random stuck notes via Midi only

[sensation]

Hi. I recently pulled my EX5 out of storage after a couple years of inactivity. All works perfectly well when I'm playing it as a standalone keyboard. I have an issue though using an M-Audio Midisport 1x1 interface and Logic Pro X. I turn Local SW to off and it plays back fine with no latency or any issue 98% of the time. On a couple of instances though there will be a bunch of triggered at the same time for no apparent reason. It only happens via midi and will occur in the lower register. It is not patch specific as far as I can tell. I am using a 2013 MacBook Pro. I believe the issue is EX5 specific as I used the same midi cables on my Studiologic Sledge and it does not act the same way.

Any suggestions would be appreciated. Thanks.