Pop-up window (market depth) right dock issue

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Pop-window like Market Depth when docked to the right does not auto-save the user preference. Every time I open it, it comes at the center of the chart that causes inconvenience and asks to be docked to the right every time which is irritating (not user friendly). Earlier it was not so. It looks like some new fix has been deployed/hotfix has come that has broke the earlier convenient feature.
Pls. look into it.