column.verticalUnderflow = .spaceEvenly in scrollable not working

[c-villain]

let column = Column { column in
column.verticalUnderflow = .spaceEvenly
column.add(child: Element1())
column.add(child: Element2(){
}.box(clipsContent: true).constrainedTo(width: .absolute(343), height: .absolute(48))
)}.scrollable(.fittingHeight){
$0.alwaysBounceVertical = true
$0.contentInset = UIEdgeInsets(top: 0, left: 16, bottom: 0, right: 16)
}

Here no flexible space added between two childs: Element1() and Element2() but column.verticalUnderflow = .spaceEvenly