Hi!
It's strange. Seems like LightRoom bug - I see something like this just a first time.
I found that this problem is gone after LightRoom restarting. But after some time, the same problem appeared again. I can't tell which actions exactly reproducing this problem, but I see that it can be reproduced, definitely. And without LR restarting, it can't be fixed. As I wrote before, I tried even change the MIDI2LR versions, and restart the controller itself, but without LR restarting it is not works. (To be honest, I'm pretty sure that I did even system restart during this problem.. But I can't be sure about this now, it was the hart time for me and I was too angry to remember everything what I did - but I have had no controller for couple of days).
Newer saw anything like this before.
BTW, thank you AGAIN and AGAIN for the great app. When I realized that my controller doesn't working anymore, I tried to handling with LR as usual, with my mouse... and I found that it is totally impossible :)