Using groups in OSX seems to add the top of the window until resize

[draxil]

If I use groups it looks fine in linux but in OSX a bunch of padding gets added to the top of the window. Looks to be the height of the combined children. As soon as the window is resized this magically fixes itself.

Rough demo program:

package main

import (
        "github.com/andlabs/ui"
)

func main(){
    ui.Main(func(){
        window := ui.NewWindow("boo", 100, 30, false)
        vbox := ui.NewVerticalBox()
        vbox.SetPadded(true)

        for i := 0; i < 10; i ++ {
           grp := ui.NewGroup("Group")
           grp.SetChild(ui.NewButton("THING"))
           vbox.Append(grp,true)
        }
        window.SetChild(vbox)
        window.Show()
    })
}

[andlabs]

Yes, this is a bug, and I'm not sure why this happens.

[draxil]

Is there any way to force a window resize so I can cheat this away?