Contextual filter with Node Reference and Pathauto
I'd try this with a contextual filter for the research brief content:nid and then use the default value: node id from the url. This works regardless of pathauto and always provides the correct node is for the research brief.

Then add a Views relationship (join) from the Research brief to the Grant. Select the node reference field for this relationship.

Finally select the fields you want to display, using the Grant relationship.