I dont have the full container hierarchy, but a TabSheet at 100% height in a VerticalSplitPanel (also 100% height) is resulting in a scroll bar being shown for the TabSheet, with a 1px scroll.
Looks like it may be some small rounding issue in Valo (it’s OK in other themes).
My workaround at the moment is to set the TabSheet to 99% height, but it’s not ideal.
Cheers,
Lee.