When looking in the core code of v13, after realizing that we were trying to use a media picker property in Examine and it was never being indexed, that these are properties intentionally not being indexed:
* Color Picker
* Image Cropper
* Media Picker 3
* Multi Url Picker
I ended up finding a workaround for what I needed, but I couldn't find any way to force Examine to include the UDI of my media picker in my index - does anyone know of a way to do this?