Hi Sophie,
I had similar looking issues on my Windows 10 HP laptop, with an Intel HD Graphics 620 GPU. In my case, changing the driver fixed the problem. I can’t remember the details exactly, but I have a feeling that using the latest version of the drivers direct from Intel created problems, which were fixed by using the previous version of the Intel drivers. I can’t remember why I decided not to use the HP-supplied drivers, but it may have been because of these issues – sorry, I can’t quite recall…
All this to say I reckon this is going to be a driver-related issue, and you may find trying different (recent) versions of the drivers may sort out the issue for you…
All the best,
Donald.