Custom Filter on a Linked Relation Column not Working

I have a “Project” Table and a “Strategy Table”. The Strategy Table is a Relation to the Project Table showing the list of projects linked to each strategy on the Strategy table. I want to filter the list of projects shown for each strategy based on a specific timeframe, however, nothing happens when I use the custom filter option for the linked column. Anyone know how to navigate this. Would appreciate the help.

Can you please share a copy of the doc?