[Milhouse]

The same thing is happening in the stock OpenElec beta. Does anyone have any pointers?

If it's happening in the stock OE beta you'll need to bring it to their attention - if they don't see your post here, then post on the OpenELEC forum (there's a Beta 4 thread) or post technical details - lsusb, dmesg etc. - as an issue in the OpenELEC github.

Working back through my test builds to identify the build when the break occurred would also be useful to know and might allow the OE developers to focus on a solution.