There is no HZD achievement system, that's the whole point.

HZF only reports to Galaxy, Galaxy displays the overlays.

Did you try changing the DX or HDR settings in HZD?

I didn't change anything.

If i play with HZD under steam (yes i have steam version too), there works everything fine. The hardware and software ( dx12) errors will disappears if a change gog to steam ?

GOG's overlay will be definitely differently coded compared to Steam's. It's entirely possible you'll encounter other games out there which have a similar reaction as HzD, just none of the ones you've tested from your catalogue.

Yes, you could still have an issue with your hardware and it's GOG's overlay approach in concert with something specific in the way HzD is being "drawn" on your screen which causes an issue. If you're not overly concerned about it, just disable GOG's overlay for HzD and move on. If you've tried clean driver installs, Galaxy reinstalls, game reinstalls, DX fixes etc then the last culprit is likely your video card ... or monitor(?). It's one of those rare problems no-one wants to have.

You have checked you don't have any other overlays running at the same time or something? Galaxy IIRC is supposed to disable its own overlay if it detects others running, but there's always a chance it failed and some kind of weird conflict is happening.

I dunno, I'm grasping at straws at this point. I hope that reddit poster gets back to you with some kind of lead. :(

Most likely, Steam's overlay is programmed differntly.

This is strange behaviour indeed. Then again I never play with Overlay, so I might be affected as well :)

Thx

Ill turn off too thx

JFI: Galaxy just received an update, one of the patchnotes is "increased stability of overlay in games".

This may or may not fix your problem (edit: or you got the update before me and it is the cause for your problem, who knows?).