I've tested both joypads under Win10 at my PC and they worked fine. Accoridng to my observations, the pads disconnect when they're plugged in together. It doesn't happen when only one of them is plugged. Also, it seems that when I replug the dongles with Recalbox switched on, it sometimes helps to get rig of the disconnecitons. At least this is what I believe for the time being, I'm still testing it.