What it says on the tin.

When shift-clicking maximize or using the 'maximize window(ignore monitor splits)' command the split taskbars are appearing in front of the maximized window.

Surely this isn't intended behavior - as ignoring splits should by definition imply the intent to view the content on the full monitor?

The attached image displays the problem (though you have to look closely, as i've set the taskbars to a high transparency to minimize the issue) on the top center 4k monitor, which is split into a 3x3 grid, with tray/windows icon disabled.

Thanks, in advance, for the help

Edit:
Added additional screenshot with transparency set to 100% in order to see the problem more clearly.