Duplicate comment when showing more replies from a nested comment page

[jrawsthorne]

Expected behavior

When I click show more comments only 1 of each comment should be shown.

Actual behavior

When I click show more comments the comment I was viewing is duplicated

How to reproduce

• Visit https://busy.org/@jrawsthorne-dev/icos#@jrawsthorne-dev/re-jrawsthorne-dev-re-jrawsthorne-dev-re-jrawsthorne-dev-icos-20180710t155456746z
• Click show more comments
• Scroll up and you will see "Hopefully final test" duplicated at the top. If you scroll up quickly enough you can see the duplicate blue highlight on the right.

Recording of the bug

https://streamable.com/2xn0o

Blue highlight

https://streamable.com/s777n

[Sekhmet]

To be honest I don't know how should it work.
I don't think removing pinned comment or comment from the tree below makes sense (especially the latter as it breaks the discussion tree). If you click Show more button it should show more, but not remove pinned post.

What do you think should happen in this case?

[jrawsthorne]

The page moves and highlights the comment you originally visited so I don't see why the duplicate one above still needs to be there but I see where you're coming from.