Dynamic vertical favourites bar - rearranging glitch

When trying to re-arrange the items on a vertical dynamic favourites toolbar, using drag & drop, the items do not position where they are dropped.

see video

the command being used is:
@ctx:="Favorites SHOWICONS USEQUALKEYS NOOPENINTABS AUTOCREATE BRANCH=""" + LanguageStr("FavoritesBar") + """ KEYARGS "" mmb:NEWTAB=focus"""