Intermittent Microsoft Designer Bluetooth Mouse on XPS15 9550
The Microsoft Designer Keyboard and Mouse operates very intermittently. I notice this most frequently when the XPS15 dims or turns off the display but it can also happen spontaneously while I'm moving the mouse pointer around. I think both mouse and keyboard stop working at the same time. I have found that sometimes, if I use the trackpad to move the mouse pointer around, the Designer mouse starts working again. If not, it appears to not update the mouse pointer indefinitely or until I reboot the XPS15.
I've spent time pairing and unpairing the mouse. Pairing pairing fails maybe 10-20 % of the time.