Creating records in elements with a linked record source is disabled?

[egordin]

Does anyone know why creating or linking records in elements with a linked record source is disabled (locked icon)? 

Right now, you see this when you mouse over those disabled buttons:

This feature is not currently available in Interfaces for elements with a linked record source

 Because I do need a linked, filtered, and sorted list element with a record source, I came up with the solution of adding a record picker element, just purely for the ➕ button that isn't disabled. 

I think the hover message means that the Airtable team is working on it, but not sure what the timing or issue is. Anyone know?

[petererceg]

Fixed, was my error, didn't have match to multiple selected in the link between tables.