Hi ShorterBuss
My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.
This is actually how Edge has always behaved, it doesn't show the gallery like Internet Explorer when you have multiple tabs open. You would need to have multiple Edge windows open to do that.
I would also recommend you submit a feature request; send me the short link so I can vote on it and bring it to the attention of the Windows engineers.
https://windows10.help/blogs/entry/54-how-to-su...
Information in the above link is sourced from a trusted Microsoft MVP blog.