System Information
Operating system: Windows 10
Graphics card: GTX 960
Blender Version
Broken: 2.8, January 14th release
Worked: 2.79
For no apparent reason, in the UV editor, using the scroll wheel to zoom in and out, or pressing the middle mouse (also the scroll wheel) to pan around, will suddenly stop working and just as randomly, start working again.
Just open the UV editor and start zooming and panning around with the middle mouse button and scroll wheel. If it helps, I'm using a Logitech M705 wireless.