Reported File icons change just by opening properties window

[Jeyekomon]

All my associated files had the default "red cat" icon. I did the following sequence of commands:

Properties --> Extensions --> OK (to close the properties window)

The icon for all the files changed and is now different for each format. I consider this an unexpected behavior.

I can now go back to the Extensions submenu, open the Icons window and change the icon back to the red cat. The icon changes back and the bug cannot be reproduced anymore so it appears to be some initial setting.

Windows 7 64-bit
IrfanView 64-bit 4.56