I have a Lumix G7, here's the issue
I'm in Manual mode, and I have Constant Preview on, so if I modify the aperture, shutter speed, ISO, WB, I see everything correctly in the preview.
However, if I try to focus manually with the ring on the lens, the MF Assist kicks in, and auto exposes everything in the view. After I'm done focusing, and the manual focus assist goes away, the preview goes back to the normal exposure that I'm actually in.
It doesn't matter if I have the Manual Focus Assist in full screen, or PIP mode. When it kicks in, it just does automatic exposure, when it goes away, I see the normal exposure that I'm in.
Is there any way to turn off this auto exposure feature on the Manual Focus Assist? It became quite annoying.