When I open inventory of any kind and try to move items around items are not "pop out" like before. Before you could click on item and it would tell you the name and you could drag and drop it around the screen, and drop it from your inventory or chest screen. This change currently in 1.2.10.1 was completly unnecessary and if anything a downgrade. The way classic UI worked before is the reason why everyone switched to it. You should bring the drag and drop back because this is just uncomfortable if anything.

Edit: 3 betas later and still not resolved