I want my GUI to remain at a fixed position. However, when I resize the Explorer window, the GUI scales down or up, becoming either too small or too large that it gets outside of the screen.
It’s not a bug.
There are a lot of posts here already about scaling GUIs to different screen sizes.
I’m sure you’ll find something here if you Search things like: GUI scales different on different devices Gui weird sizing gui different on mobile Gui on different aspect ratio screen