I wonder if you had any response from Arturia? Probably not. Far out worst company concerning support and solutions. I made the big mistake to buy Two of them Keylabs. Original and MKII, Didn't learn from the first one. Waited 2 years on a firmware update concerning 'hanging' keys on the MKII. Finally it came trough. Now I found out that my Boss-EV30 and my boss FV-500L expression pedals switch CC11 between value 0-127. No values in between. Again a longtime addressed problem, reading all the treats, with no response from Arturia.
Guy's at Arturia. Shame on you for your terrible after sales. I got my eyes open next time for a different brand. Sick of you guy's.
(EDIT : Problem didn't occur on the Original Keylab61, that one works fine. Only the MKII having these problems. Same as the 'hanging' keys after a slide, only occurred on the MKII not on the Original. The Original KeyLab seems to be a overall better designed board. So my guess is that it is definitely a bug which can be solved by a firmware update. So hope they find the time and energy to address this problem ).