M50 -88 - some keys non responsive after sitting on its back

[auralplane]

Howdy,

I got my M50 - 88 back end of October (yes, Canada had them in the stores before Nov 1st).

I did a gig the other week and afterward, left it keys facing up in the bag for the next week and a half.

Anyways, I put it back on the A-Frame to work on another project and ran across something really weird.
About 5 of the keys weren't responding and I had to fff them several times each before the sensors came back to life. I've never run into this with a keyboard before, but I'm keeping my eyes on it.

Anyone else run into this before? Again the condition was the keys were verticle where they would not be resting on the sensors below.