Privacy Rules "Can't grant search access right now"

Does anyone know what this message means?
What is Bubble trying to tell me? Is there something up with Bubble or my app?

*** Rules that use “This __________ X’s Y” can’t grant search access right now**

It’s a Bubble limitation saying privacy rules can’t go the extra layer deeper. They can only check fields directly on that Thing.

Like how you can use search constraints, but as soon as you want to filter a layer deeper you have to go to the advanced filter.

I think people end up using a database trigger to sync X’s Y’s field with X’s field. Then privacy rules just point to X’s field

Makes sense, thank you!