UIKit 2.2.1
A CodeSandbox for demonstrating this issue. and it also happen in your demo home page [1].
When use in static document flow (not position: fixed;), the message container will scroll down when fetched old messages in order to go back to previous position. However current implementation of this behavior [2] will also effect the outside scrollbar, and this behavior is awful in our scenario which will disturb user when seeing Live stream. I think the feasible solution is calculating the target scroll top and set it to the message container’s scrollTop attribute instead of using scrollIntoView().
