Xcode Previews break when using ScrollViewProxy + Preferences

I'm working on a horizontally scrollable header view. I'd like to implement the following behavior: when users tap on the left/rightmost header items, the header would scroll so they become fully visible. I am using a custom PreferenceKey to report the selected index:

struct SelectedTabPreference: PreferenceKey {
	static var defaultValue: Int = 0
	static func reduce(value: inout Int, nextValue: () -> Int) {}
}

Then in my view, I wrap my content inside a ScrollViewReader to scroll to the selected header:

struct ContentView: View {
	let tabs: [DrawerTab]
	@State private var selectedIndex: Int = 0
	
	var body: some View {
		ScrollViewReader { scrollProxy in
			ScrollView(.horizontal, showsIndicators: false) {
				TopTabView(options: tabs, selectedIndex: $selectedIndex)
					.padding(32)
					.background(Color.clear.preference(key: SelectedTabPreference.self, value: selectedIndex))
			}
			.onPreferenceChange(SelectedTabPreference.self) { value in
				let firstTabSelected = value == 0
				let lastTabSelected = value == tabs.count - 1
				guard firstTabSelected || lastTabSelected else { return }
				withAnimation {
					let anchor: UnitPoint = firstTabSelected ? UnitPoint(x: 0.1, y: 0) : UnitPoint(x: 0.9, y: 0)
					scrollProxy.scrollTo(tabs[value], anchor: anchor)
				}
			}
		}
	}
}

This works well when I run the app, but the Xcode Preview only shows a white screen. In fact, if I include this view as a subview in other views, their previews also break. The Preview only returns to life if I remove the programmatic scrolling:

scrollProxy.scrollTo(tabs[value], anchor: anchor)

I'm pretty sure this has to do with the ScrollViewProxy as my other Preference-based layouts work with Previews, but I don't know how to resolve the issue. Xcode Previews are an integral part of my workflow, and I'd like to avoid losing them if there's a chance.