I just tried to split a 1300 post topic, splitting about 200 posts to a new topic.
I used filter by user, then selected “this post and replies” on those posts.
I could only move to an existing topic (created one in another tab).
First try it gave a generic error message.
I closed the other tab, then I could move the selected posts.
It moved much more than just the posts I’d selected (only left 2 posts in the original).
It closed the original topic.
Is this a bug, or PBKS?