The surfaces of the window could be overridden. There should be a panel in the Windows Settings dialog box that will do this, but I don't see this in your screen shot, so it is probably hidden. First, go to Work Environment > Tool Schemes > Tool Settings Dialog Boxes and select Window Tool in the middle panel and see if "Model" is visible in the right side panel. After saving this change to your Work Environment, open the Window Settings and open the Model panel and see if it is set to Override Surfaces.
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Looks lik this Graphical Overrides. Maybe overrides set to renovation filter. For example if window is set as existing and existing elements set to be "painted" with White colour in 3D. Most likely that the reason.
Another possible reason (but I'm not sure about it - it might happen only if file was created previously in old versions).
There is possibility to have override to the window model, but currently this panel is hidden by default. To show it go to menu Options/Work Eviroment/Tool Settings Dialog Boxes. Set section Model to be shown in Window tool and in Wibdow settings check, is there override set there or not.
I haven't dug in as yet, but will post a solution once I've spent some time on it.
Looks like your 'Planned' renovation filter is overriding the surfaces for what ever renovation style the window was placed as - existing, new or to be demolished.
The 'Existing' renovation filter is not overriding the surfaces.
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