Can you add option for this feature, disable or enable?
(gui disappears when cursor )

"this is a feature, not a bug, used to hide the ui when a tooltip is open, move the UI below the map ;-)"

I need a good reason for disable it again ;-) I have programmed this specially so that the tooltip is not hidden anymore.
where do you place the window?

https://gyazo.com/2e577e92f17bcd6628e6d99b96edaa2a
https://gyazo.com/2ae883e6286761cbc74be093ad9fbdc7

Wrong usage, for your position you can use the original version
I have mine developed with 2 columns wide so that it fits exactly under the map ;-)
https://prnt.sc/MxYTXBY9WIUs
But when I add settings then I make auto-hide optional, but is not hight prio.

thx for answer, ill wait

Can you tell me where I can turn it off for my own only use?

yes local change is the easiest as long as you don't have to install updates ;-)
in events/game.lua disable this line
Events.on_event(defines.events.on_selected_entity_changed, on_selected_entity_changed)
->
-- Events.on_event(defines.events.on_selected_entity_changed, on_selected_entity_changed)

thanks