KU band is the one, also look out for KA band.
Have you tried selecting 4.9E, and 1W, in your options?
Can you please post your satellite setup, Fixed dishes, multiple LNB's, with Diseqc switch, Motorized dish, dish size, general location, etc., and how you've got your tuner configured.
My vu+duo2 has tuner A,b,c tripple tuners!? A and B is ( AVL-6222)(DVB-S2)
Tuner A is like before : Config-mode is set to simple and mode is set to single. Connected to a offset 85cm fixed (no motor) dish. One lnb inverto black ultra quad. Pointed to Thor 0,8w
Tuner B goes into the same tuner module ( AVL-6222) Set to (Equal to Tuner A)
Tuner C has lnb in and loop trought. ( AVL-6211) and connected to a 4 port diseqC switch. Two fixed dishes are connected. nr.1 Triax (1m in diam) multiblock 0,8w, astra 4,8e and Hotbird 13e & Nr.2 last port is connected to a 3,4M dish focus feeded pointing to Astra 2 " 28,8e "
My location is Western Finland ( Ostrobothnia )
Reason for having thor in two different tuners is for recording purposes. It is mostly channels from thor i watch actually.
I hope this was to any useful information. I`m gonna try reflash to 3.0.5 again and see if the problem still persist.