I have 197 photos (jpg) in a folder all sized to 1280 at the long end, When I go to browse that folder on my touchpad, it displays small white boxes for most photos instead of previews, and at the bottom where it shows the total number of photos it changes every 2 seconds from 197 to to 186, to 192, then back to 197

I have removed the folder and all photos, recreated it it I still get the same result

Do I have too many photos in a folder or something? I didn't think 197 was a lot, does the touchpad try to re-render the previews every load of the photo app or something? Even so I thought by having the long end 1280 it it would show the previews faster?