If the Standard Display is not closed when using the MxN view, the render windows are somehow connected. Navigating in the MxN windows should not affect any of the others, but movements are synchronized, e.g.

In D914#35507, @kislinsk wrote:

when you load Pic3D and US4DCyl for example and set the data-based layout, navigating in one of the Pic3D render windows outside the bounds of US4DCyl does basically bake in the last shown slice in the US4DCyl render windows, that are now out of bounds and should - I guess - instead show nothing/only background.