My shift-button also startet to not work properly now and then. After roghly three weeks of usage. I have the feeling it’s worse if I use it on my lap and not on the table. But it’s not a big issue, yet and I can still work with it like that. Double triggs are not yet an issue with my unit.
On the other hand, the pitch bend now works MUCH better than during my first days. First I had to press real hard to pitch down, now it works just as smoothly as pitching up.