This problem occurs because the RadEditor is moved inside the DOM when the dock is moved. To avoid this issue you need to call RadEditor's onParentNodeChanged()
client-side method when the dock position is changed. To achieve this you need to assign a handler to the RadDock's ClientDockPositionChanged
Also, you should set the RadEditor to Design mode until the RadDock is being dragged. This can be achieved via the dock control's client events OnClientDragStart
and the client method set_mode
of the RadEditor.
You can find attached a sample page, implementing the suggested solution.
the Telerik team
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