Visual Builder Studio – Form Rule condition does not work correctly with DFF field

We are customizing an RSSP page using Visual Builder Studio.

On the “Requisition Details – View” page, I created a Form Rule and set
“Cancel Action” under “Requisition Lines” in Regions and Fields to Hidden.

When no condition is defined, the Cancel Action is correctly hidden on the Live page.

However, after adding a Condition to the form rule,
the condition is not evaluated correctly, and the Cancel Action remains visible on the Live page.

The condition I configured is as follows:

if Component Integration Key (Lines) Initial Value is not null

Note: “Component Integration Key” is a DFF (Descriptive Flexfield) defined on Requisition Lines.