I've just tried this on my laptop (Thinkpad Carbon X1 4th gen), using Wayland with Intel graphics on Arch Linux. HDPI is enabled. With the extension enabled my desktop keeps flashing; it looks like the entire screen momentarily turns black, but so briefly it's difficult to tell. Occasionally a flash will happen spontaneously, but it's mainly triggered by opening windows and menus. Menu flashes seem more pronounced, perhaps they last longer than the others. Turning off application blurring seems to fix it.
I've just tried this on my laptop (Thinkpad Carbon X1 4th gen), using Wayland with Intel graphics on Arch Linux. HDPI is enabled. With the extension enabled my desktop keeps flashing; it looks like the entire screen momentarily turns black, but so briefly it's difficult to tell. Occasionally a flash will happen spontaneously, but it's mainly triggered by opening windows and menus. Menu flashes seem more pronounced, perhaps they last longer than the others. Turning off application blurring seems to fix it.