Widget stacks disappearing on iOS 14.2?

Since I upgraded to iOS 14.2 widget stacks become invisible when I swipe between widgets within a stack. As soon as the animation of the move finishes, the entire stack “disappears”. The stack is not really gone, because when I move to the springboard and then back to the leftmost page with widgets the stacks are shown again (with the widget I selected).

Anyone else experiencing this?

How to fix it?