Model-driven app Quick Create form not opening from the subgrid of a related record
I have a dynamics sales instance that uses the model driven app. i am trying to customize the opportunity table by giving it a relationship with a custom table called SRP Activities. I want the user to be able to create a new record from the subgrid tab on the opportunity form. when i click + new record it opens the normal form in another window. I've already checked the box for leveraging quick create ability in the table properties and have created the quick create form. is there anything i'm missing that tells the model driven app to open the quick create form automatically from the subgrid or do i have to customize using javascript or the ribbon editor?
If i click + record on a related table that is OOB, it works perfectly fine. Screenshots below
Opens
But when using an OOB entity like contact the subgrid click does this
