Panasonic Cameras - Manual + AF-S when shooting video?

[sgreszcz]

I have a GX7 and LX100 that I use for stills and video. I'm trying to set it up to allow me to readjust focus using auto-focus (AF-S) when shooting video. When I had my Olympus cameras, it was quite easy to reset the focus automatically when recording was ongoing, but after many tries, I cannot get this functionality working on my Panasonic cameras!

I have AF-S setup to work on the back AF/AE Lock as well as the shutter half-press. It works correctly with both cameras in AF and MF (manual switch) mode BEFORE starting recording, but as soon as I start recording, neither button will cause the camera to refocus.

 

Under Motion Picture Menu I have:

AFS/AFF/AFC : AFS

Continuous AF: On

 

Under Custom:

AF/AE Lock : AF-ON

Shutter AF : ON

Half Press Release : OFF

Quick AF : OFF

Eye Sensor AF : OFF

Focus/Release Priority : RELEASE

AF+MF : ON

MF Assist : BOTH

Constant Preview : ON

 

Thanks for any help here.