TTMSFNCTreeView.NodesAppearance.Stroke not used at run-time

When you choose a solid line type in TTMSFNCTreeView.NodesAppearance.Stroke, then the lines are shown at design time, but not at run-time. Is this a bug or by design?
I am using the latest releases of FNC Core and UI Pack.

This is a bug and this is related to default values. We haven't yet found a workaround for handling default values that are not persisted in the form file. To workaround this, please change the type at runtime.