Issues when using IsGroupHeadersVirtualizationEnabled=true in timeline mode with different-sized resources:

- Drag&Drop of appointments ends up in the wrong place. The drop preview is also displayed incorrectly on the wrong "resource".
- Placement of appointments when scrolling vertically. Landing visually in other "resources".
- The marking of the slots/cells under the mouse are shifted/wrong and thus also the selection of areas/slots.

When the collection bound to the AppointmentsSource property is cleared and filled with data again, the tooltip of one of the appointments could become visible and it will be displayed on top of all applications.

If ShowWeekGroupHeaders="True" and we have AllDayArea, the extra line from week group header is not taken into account by the AllDayArea and that shifts the last appointment in it to show in the day area.

The XAML team has recently reviewed this issue and will not be addressing it as at this time the team is focusing on the bugs impacting the highest number of developers. If you have encountered this issue and it is blocking for your work please contact us through the support ticketing system with details on your setup and a reference to this item.