Vanishing taskbar thumbnails in Win 10

Hello.
I have this new PC. I am new user on Windows 10.
The problem is that thumbnails/previews on taskbar of opened windows (folders, programs, pictures,.....) - the thumbnail/preview vanishes after 1-2 hours.
The thumbnail and preview of real open window is replaced with just an icon.
I have to open particular window to get the thumbnail and preview back.

I made two screenshots of a problem/bug: (I AM NOT SURE IF IT IS CALLED THUMBNAIL)



Can you please tell me what is problem called? How to fix it?

Thank you!

Windows 7/8 do not do this! For sure.

I believe it's a 'Save Memory when Minimized' thing in Windows 10 but, it's so finicky, I'm not sure if it works properly!

You could try setting 'Save taskbar thumbnail previews' on in Advanced Performance Settings...



You could also try setting your power plan to High Performance. Not sure if High Performance plan circumvents the suspension issue but it can't hurt to try.

@andrewtt

Suggestion only : try the clear and reset thumbnail cache tutorial
Clear and Reset Thumbnail Cache in Windows 10

Edwin: It worked! (last 3 hrs it works) Thank you!

The solution is "Save taskbar thumbnail previews"

Unfortunately the problem continues. I will try another instructions when I get back from work.
Thank you