@Dorset hi Dorset, Yes, both my menu and lobby is enabled, and all other custom icon works but the unknown icon. I also tired the "Scale Strategic Icon" in the option but it scale all icons including the medium sized which make it too large. Does your unknow icon change when using custom icon?

I have a medium sized strategic icon mod active but unknown unit still icon does not change. It shows regular unknown icon and its too small for my monitor.