Folder thumbnails preview are stuck, not changing

I have some ( not all ) pictures folders with maybe 100-300 pictures each, the folders thumbnails preview are stuck, not changing. by default, the last 2 created pictures are the folder preview thumbnails, but for some pictures folders, the thumbnails are stuck despite new pictures being added to the folders. if I remove the pictures with the stuck thumbnails from that folder, the folder thumbnails will change again by order of latest which is normal. did some trial and error, the same pictures have the same stuck thumbnails preview problems on different folders.

this is picture or folder problem, why ? thanks.

dalchina said:

Hi, you could try

Rebuild Icon Cache in Windows 10

Change Icon Cache Size in Windows

I have not thought of rebuilding the icon cache because the stuck thumbnails only affect some ( not all ) pictures folders. thanks.