Currently the Menu with RenderMode="Mobile" expands only in one direction(down) and disregarding the value of the DefaultGroupSettings-ExpandDirection property.
The default behavior of the mobile menu is the following: when popup with root items is opened, its height is calculated depend on root items count and their height. After opening a sub-menu, where items count is different, the popup height is not updated. The suggestion is to add a functionality to popup menu to update its height every time after opening a next item.
Currently, as mobile browsers scroll bars are transparent and initially not visible, there is no indication to suggest to users that a mobile RadMenu can be scrolled down to see items not currently displayed. The suggestion it to add a mobile RadMenu visual indicator which shows to users that there are more items to be seen on scrolling the menu. It would enable customers to set a mobile RadMenu height that does not fit all items, and indicate to users that the expanded menu is scrollable.