As of Windows 11 23H2 (10.0.22631.2361), Icaros thumbnailing affects the creation of folder icons. The folder icon often gets a black background.
Also sometimes the first folder icon is small
https://github.com/Xanashi/Icaros/issues/70
Also sometimes the first folder icon is small
https://github.com/Xanashi/Icaros/issues/70