After latest update I found the WINDOWS function implemented, which change the size of both windows e. g. if there sized to left and right half of screen. Hopefully it is possible to understand what I mean, since I don't know how to call this function.

This function is completely nonsense for KDE since it is possible to catch window borders during resizing. And the implementation is even worse than in WINDOWS. Now it is not possible to automatically size a window in middle of screen, since new windows always use the last setting, even in new workspaces and if resizing at one workspaces all windows of other workspaces resize as well.

How is it possible to get previous behavior back?

Thank you in advance.