No live snapshot images when using MobileController?

I just get a broken image/404 when trying to get a live station snapshot using the Mobile Controller.  I can get a snapshot on the same station when using SignageStudio desktop.  Is this a known issue?

Yes this will be fixed in 3.1, well not really fixed as the MobileController is going away in 3.1 and replaced with some new set of tools...
Stay tuned for more info to be released soon.