xfce-setting Display settings
In display settings if a secondary display (on HDMI in my case, not sure if that's relevant) is positioned on top of the primary one being a laptop display when this configuration is activated, including by attaching the external monitor, all windows on the laptop display (primary) are moved to the secondary one as if that were the primary one.
This doesn't happen if e.g. the secondary screen is positioned to the right of the primary (laptop) screen.
Following i