For various reasons I was comparing FC 1.0.2 and newest dev version (build date 2025/09/30) today and noticed that the icons "Datum Plane, Datum Line and Datum Plane toolbar icons found in Coordinate ...
After the Activity recreated (eg. daynight theme changed, screen orientation change), even if content scrolling occurs, the value of CollapsingToolbarState.progress will not change and is fixed at 1.0 ...