Good to have the v2.53 update, however it seems to have introduced an odd unwanted behavior. 

You have an app and half dozen of its child document windows showing in the taskbar.  You hover over them, and larger icons w/ thumbnails for these appear above the taskbar.  You want to use the Close control on several of the documents, and you click the Close X control on the first one.  Instead of remaining visible, lined up in position immediately above the taskbar, and closing up the row when individual items are closed (= previous behavior of Start8/10 and earlier (?) Start 11 versions), now the row of icons jumps up to the top edge of the desktop for about 2 seconds and then disappears.  I don't think that is the wanted behavior.  Don't see that this relates to any of Start 11's configuration settings.  Workaround is to repeatedly hover above the app's icons in the taskbar to bring them up into enlarged view for selective closing.

Start11 2.53, Win 11 Pro (updated to 8-25), Intel UHD graphics at 1280 x 1024.