Midi stopped working temporarily

I have had my Kemper for 1.5 years and have had no issues with anything. I recently hooked up two expression pedals (Mission) At band practice today my midi stopped working after a few songs, it would not switch at all. I rebooted the KPA and the midi pedal, still nothing, did it again, nothing, unplugged the two TRS cables from the back of the KPA and rebooted, then the midi worked fine.
I then reinserted the TRS cables for the expression pedals and the midi was working once again and is still working at this time. I have a gig this weekend and cannot have that happen.
Has anyone had this happen?

Thanks

Yes. Changed the cable, twice.

Mission pedals. It may have been a strange coincidence and just been a midi crash, which is not good either...

Ingolf, Correct, the mission pedals are hooked up correct, to the 1/4 trs jacks on the back of the KPA. My midi pedal is hooked up correct as well.

Again, my midi started working again after I disconnected the trs cables and rebooted the KPA. I am going to leave it all hooked u[p and play a lot over this week to see of it happens again.