Sticky comments have their own threads, so it doesn't make sense to have them associated with and showing in different comment threads.
I suggest only showing the sticky comment alone, not with its thread.
It might contain some important information.
It still doesn't make sense, especially when posts can contain several sticky comments.
If you want to see sticky comments of a post, just click "View as" or the comments count underneath.
My initial idea was to encourage users to read the sticky comment.
It would not be intrusive if it the sticky comments were not unfolded initially.
But it is not that important. Just my 2 cents.
(post is archived)