Its one of those dual native iso sensors and this was shot with the native 640 vs 100 ISO… Could that explain things??
It “smells” of something like that… This typically happens when shooting “raw” video (hence mentions of V-log, high gain, etc.). It might also happen if the camera is asked to output some fancy new HDR format like HEIC…?
I feel like I recall an older thread from someone with a similar camera and it has a vlog or similar photo mode and then you use a panasonic lut with it like video and they were trying to figure out how to use these files in DT… might be the same sort of thing as you mention…
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Indeed, see the “Dual Native ISO” section here.
And here’s the older thread on the S1H w/ lots of background and experimentation: Converting S1H raw files to V-Log gamma
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Thats the one… Thanks…
Tried to understand what is written in the thread you mention, but I think it’s slightly different because my trouble starts already before any LUT comes into play (however, one main reason I use the VLog is for videos, because they just have 10 or even 8 bit resolution …)
What is meant by “Dual Native ISO”?
It starts by changing the Dual Native ISO to anything other than “Normal”.
Now I made some photos with STD profile and VLog profile to be able to compare. Then I opened them with RawDigger to check if they have different “bits per sample”. In both cases it’s 14 bits.
But when I check various samples, in VLOG, the values never cross 4000. Although the Max values for G (Green) and G2 (?) are 14-15k 
Anyhow, when I import both photos into DT they “behave” quite differently.
Fun fact: in the lower view (Darkroom) the appear like that:
First and second photos are taken in VLOG, the third with STD - but all pretty the same scenery. But the second photo (in VLOG) is the selected one - and because of that it appears much darker than the other. Is this, because the “wrong whitepoint” is only used when one of these photos is selected?
However, when I change the whitepoint to around 4000 with the VLog photos, the workflow works pretty well with that.
@kmilos: Could you elaborate a bit more on “changing the Dual Native ISO …”? Is that done by selecting another profile in the camera?
The only thing I realized with the taken photos is that the STD photos have ISO 100 while the VLOG have ISO 640.
Here are two photos as example in VLOG and STD profile
P1000217.RW2 (34.4 MB)
P1000219.RW2 (34.4 MB)
Thanks for your support 
I think basically this is what you are seeing with your shots…and you can see the comments…
https://www.reddit.com/r/Lumix/comments/10w7sc7/vlog_to_do_photography/
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In the exposure module I set the target value to the default 50% and use the eyedropper to set the starting point for the exposure which may need some further tweaking, but this will bring you in pretty close to get started. Because this shot has a lot of snow this method will still be a little dark unless I select only a small section with less snow. The eyedropper will set exposures beyond 5 if required.
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