How to change title of segment in WebSegmentedButton

I can’t figure out from the documentation how to change the title of one of the segments in a WebSegmentedButton (new API). I tried

myButton.SegmentAt(0).Title = “New Title”

but this is ignored when the app runs. I am thinking this might be a bug as I can change radio group text with

myRadio.RowAt(0).Caption = “New Option”

but I don’t want to file a bug report if I just don’t know how to do it.

Looks like a bug to me.