Bug: Opening in a Window does so at a different position in the text

When a tabbed resource is opened in a floating window, it opens about three lines further down into the text than what it displayed when tabbed; particularly for commentaries.

Software version: 4.0a & 4.0b Beta.
Reported by Dave Hooton.
Forum link: https://logos.vanillacommunities.com/forums/t/11286.aspx
Status: confirmed