I’ve been using a client’s PMW-200 and for some strange reason it will lose it’s WB in the middle of a shoot, and has dropped out in the middle of a shot. The camera is in full manual mode and the WB is in the A slot. I’ve switched the menu select to all 3 positions, (full, part, and off) and there is no change. About the only thing I haven’t tried is changing out the memory battery but can’t see how this would effect the WB if it is connected to an external camera battery while shooting and this occurs. I’ve use many cameras over the years and never encountered anything like this. Any input or suggestions would be most welcome as I’m about resigned to dialing in the WB via the preset WB function in the the picture profile menu just to avoid a shifting WB.