Normally when you drag an appointment from one grouping to another the grouping id is updated.

This does not occur when trying to drag a recurring appointment to another grouping.

In this case the time will update, but the grouping itself will stay the same.

This can be tested in the scheduler grouping demo (https://demos.telerik.com/blazor-ui/scheduler/grouping)

Steps to reproduce:

1. Create a recurring appointment for one room.

2. Drag one of the appointments to another room.

3. Select "Edit the series".

Result: the appointment is moved to the time it was dropped at, but it is still planned for the same room.