Comment 31 for bug 1425000

Yes, I encountered same issue on Ubuntu 20.04 with Unity desktop.
e.g: a laptop (monitor A) connected with an external monitor B over HDMI.
Monitor A is on the left of monitor B.

In the "System Settings" >> Displays, I selected "Launcher Placement" as "All displays"

In the Terminal on monitor B, when start a new process, e.g: libreoffice or gnome-calculator,
the created app is shown on monitor A.

Whether it can be changed like this:
if a child process is created by process on monitor X, then show the child process also on monitor X.
in some situation, if the process is partly on monitor A, partly on monitor B, etc, show the child process on the monitor[0]. (assume that the monitors are an array in the system ).
It's like the child process inherited the monitor setting of parent process.

At last, whether this is an issue on Unity Desktop or X Window System, or some else ?
Please advice!