Does the Windows 11 photo viewer still have that gross flickering when changing images and absurdly slow startup that the Windows 10 photo viewer added when they replaced the old Vista/7 viewer, which had none of these issues?
And yes, at times it flickers and or images can tear.
I mean why would I? If all I need is viewing a couple of photos every now and then, cropping and rotating one or two and drawing some circles on them to highlight something in a screenshot and Windows already does that then why bother with Irfan other than habit and nostalgia.