Unreal Widget Blueprint variables inherited variables don't update when changed in designer

I have a parent widget blueprint that contains a SizeBox_Root and within that a ProgressBar, both are exposed as variables.

In the event graph of the parent widget I’m setting the Height Override of the size box, with an instance editable variable called Height.

I’ve created a wbp child. Now, if I change the Height property is the designer window, compile and save, I can see the Height var gets updated in the View, and the variables are set correctly when I look at it in the graph. When I then PIE, the height of the bar isn’t being updated.

If I then change the value in graph, and not in designer, I can see that the value gets update as expected. Is this the correct behavior? What I’m expecting is that it shouldn’t matter where the variable is edited, Designer or Graph, both should be updated.