Hello,
I am using a container in the main section, that contains all my elements. In the main section, I enabled expand content to fit which worked very well until the last few weeks.
My app didn't have any random spaces before. But now I have a huge gap in my container, and I don't know why it appeared and where it comes from.
Hello @Diamond!
That is very unusual, let me see if I can help get to the bottom of this.
Are the Header, Body and Footer all displayed above the red box of empty space?
What happens when you turn off expand content to fit on the parent container?
When you hover the empty space while editing, does the inspector pick up the space as being a part of the container or any other component?
Where does the containers bottom end? Are you able to remove this space by making the components/container above it larger?
Expand to fit content is meant to be used with a single component inside the container to fill up all the space that the container is in by removing padding and margin.
I'm thinking about what could have caused this to change without you editing it, maybe an update if you are on the cloud? If you can share a screenshot from the app editor that might give me more details on what is taking up space on your layout 
