HOG4 PC v4.2.1 virtual wing bug?

I have this virtual fader bug with HOG4 PC 4.2.1.

After adjusting group master with virtual fader, switching to different view or closing virtual wing window and reopening it, resets all virtual faders that have different value than BO, back to full. Group master value remains despite the fader position, touching fader changes group master value to full.