Vertical frame: "Enable Auto-Size" does not work for heights less than 10 sp.
OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 188.8.131.527915773, revision: 1977cb3
"Enable auto-size" should adjust the height of the frame according to the contents. However, the default height is set at 10 sp and will not adjust to a content height less than this.
"Enable auto-size" also needs to disable the "height" property. But, currently, it is still possible for the user to change the value by clicking on the adjustment handle and dragging up or down.