Auto Layout doesn't work as needed

Hi all,

I’m hitting a roadblock trying to understand why Auto Layout isn’t working. I want the text in the left column to expand to full the space horizontally, so I’ve set it to Fill Container, but it doesn’t fill. Am I missing something or is this a bug?

The item you have selected is within two others, you’ll have to check those settings too. It’s also likely they are set to Hug (only be as wide as content) and the content set to fill (only be as wide as the container) so Figma doesn’t know what the width should be. I usually make the top level fixed width and the levels below Fill.