With the current implementation of the LoadLayout method, the current layout of RadDocking - all RadPanes (including floating panes), RadPaneGroups and RadSplitContainers - is cleaned. You can prevent this from happening by canceling the ElementLayoutCleaning event for the given pane as explained in this article. In this case, however, you will need to manually persist the settings of the floated panes.
I hope you find this information helpful. Please let me know if I can further assist you with anything else.
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