Some info for you.
I have a vu+ duo2 with 2 sat tuners
I bought a vu+ usb tuner for cable
All worked well until I tried to switch between a cable channel and a sat channel.
Box freezes.
Had to switch to oscam plugin from cccam, but cable channels not working great using oscam. Have been told to switch back to cccam, in which case I cant switch between cable and sat channels.

Someone did say to try another image. I might try that and see if its a cccam issue or an image issue.