I feel like my original post got deleted somehow so I'm re-posting:

I was playing at church tonight with Sunday Keys/ Mainstage on their Yamaha CP300. I've done it before, no issues. BUT TONIGHT... it would only transmit part of the midi notes to the keyboard! I could see the keys on the screen either not working at all, or locking up. At times it only played the lower half of the keyboard. So I rebooted. Everything was working for about 4 minutes and it started again.

I ended up not using Mainstage and just using the keyboard. Came home set it up to recreate the problem. Works perfect. WHAT THE....???

I'm wondering of the USB Connect from the keyboard is loose or disconnected. Has there been anyone else who has had that problem?