Hello,

I noticed a scrolling problem when the discussion is long. It blocks and jumps.
I've made a video with your demo on a macbook pro with a mouse.
With trackpad, there is this problem only when cursor are on scroller button.
The problem is present on iPhone too.

You can see my video here :
https://www.screencast.com/t/Am4dmwgZGbv

Thank you,
Philippe