CircleSpace thinks it can paginate when it can't

The CircleSpace contains all of the timeline rooms in a circle. Its canPaginate property is computed based on whether the child rooms can paginate.

But unfortunately when we try to use this in a SwiftUI View, it incorrectly tells us that it can paginate when it can't. I suspect maybe the CircleSpace isn't sending a Combine update when the child rooms update, so the View doesn't know to re-render.