• BookStack Version 0.18 (on Demo Site)
• Observed on Mac OS High Sierra 10.13.1, Chrome Version 62.0.3202.89

In Edit mode: Dragging an attachment into the page, creates link in the current paragraph to that attachment. So far, so good...

However: If one grabs the reorder attachments icon and moves it to reorder (regardless whether there is one or multiple attachments), dragging the attachment itself into the page is no longer possible. In other words: Reordering breaks the ability to drag the attachment link into the page.

Workaround: Save the page first, then enter Edit mode again, and dragging attachment to create link works again.

Video with bug in screen recording session:
https://www.youtube.com/watch?v=_N78tA0eq2k