I sometimes lose some of the preferred types that exist in my PreferredTypes file under Assets/Editor Default Resources. Because the file is source controlled, i revert the changes back and continue working.
I haven’t seen any way to reproduce it. It just happens without any other error. There’re two types that’s lost. One is a custom type and the other one is ProceduralImage class.
According to aFoolsDuty on Discord, this might happen because of a racing condition while using FC with asmdef.
I’ll try to use FC without asmdef for sometime and share my experience under this post.