Web Browser behavior on new tab/window

[oldtopos]

If I open a new tab on Chrome, for example, with the current Chrome screen spanning four monitors, the parent Chrome window resizes to the extent of the top two monitors.

With Safari, it also resizes to the size of the top two monitors, but the window is positioned on the top right monitor with the right half extending off the right hand side of the display surface.

[oldtopos]

So, is this behavior a known issue ? If so, any plans to fix it ?

Any settings I can tweak for either the system or the browsers to address/change it ?