I use cascading parameters and need to specify their Text property with an Expression, as the label should be translated through a User Function. My parameters shouldn't have values initially.

The problem is that the dependent parameter's Text Expression is not evaluated when the report is first displayed by the designer or viewer. The label shows the Expression instead.

If I make the independent parameter Nullable, the issue doesn't occur, but I prefer not to allow Null values.

The problem is shown in the linked muted video.