Undo sorting column in SHARE

In the SHARE section it somehow defaulted to alphabetical track order. Playlist → *right click → Share → When I click the sorting arrow it never stops sorting. I know in the “main playlist” it says keep clicking until the arrow goes away, but in this area it never goes away.

How do I get it back to the playlists actual order before sharing?

I think you find an oversight, it doesn’t seem possible to “unsort” it there.
Here is a workaround: show a column that you don’t use at all (empty for all tracks), then sort down by that column, it will give you the original order.