The panels would have an effect slide when its visibility is AutoHide or LetWindowCover. Reproducible: Always Steps to Reproduce: 1. Set auto hide Visibility to any panel Actual Results: Note that the panel does not have animation when hidden or showing Expected Results: The panel should have animation when hidden or showing, furthermore a delay when you bring the mouse to edge.
fixed in 5.8
It's not working for me either.
i confirm again, it works in 5.8 it can only work of course for autohide panels, because in case of letwindowscover, the panel is already there, it cannot slide/move, because it's already there and visible, just partly covered by something (best visible when there are no maximized windows, so the panel is partly visible)