So recently I encountered a strange bug - the gui elements are not being shown in the explorer, but are shown in the game window.
LocalScript (that is located in StarterGui) creates a new frame, and assigns its parent to
StarterGui.ScreenGui. It is being shown on the game window itself (of course from
client), but is not shown in the Studio Explorer, not on client (from
StarterGui) nor on server (I am watching from
I tried to make the topic understandable. If you have any other questions - ask.