blue underlined link - drilldown

Hello,

I'm trying to set up a drilldown, and I'm having a hard time getting it to look like I want.
I want to have it be a blue underlined "link" type of field, which is standard for drill downs, for example the "Qty. On Hand" on the item card.

Instead, I always get a regular looking field with an assist edit next to it... what gives?

This field is an integer flowfield with a Count(...) formula.
I have set the drilldown form ID on the table and page level, took that out and tried putting in custom drilldown code... nothing.

Any suggestions are welcome, thank you!

*Edit*
One fact that may be complicating things: the page itself isn't based on the table with the flowfield. Instead, the field references a record.field. Ie the source expression is "Item.Inventory" (OK but it's not the item table, but a custom table )

- Reinhard