I recently downloaded some custom icons from this site: https://icon-icons.com/
I wanted to change the icons for 'task manager', 'show desktop', and 'character map'. I only downloaded the .ico files, not the png files. I went through the process of changing them, pinned the apps to my taskbar, and they worked fine.
However, when I start up my PC, these particular icons turn blank. They still open and work, but they show as blank pages on the taskbar.

Any idea what's going on?
I wanted to change the icons for 'task manager', 'show desktop', and 'character map'. I only downloaded the .ico files, not the png files. I went through the process of changing them, pinned the apps to my taskbar, and they worked fine.
However, when I start up my PC, these particular icons turn blank. They still open and work, but they show as blank pages on the taskbar.

Any idea what's going on?