Groupbox wont scale with size of window

Hi,
Working on an editor window. I can get things to fill the space of the base canvas size but once I increase the scale of the canvas beyond the original size the main group box doesn’t scale with it. Any idea why this doesn’t scale up with the size of the window when I drag it?

Hi, it appears that the size of the container on the left is restricted.

There are many reasons why this can happen. I suggest opening the UI Toolkit debugger and looking if there’s any width/max-width set that could restrain the element from expanding.

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