Difference between editor and real mobile screen

Before opening my question, sorry for the non-English screen.
But i believe the problem i’m dealing with is not relevant to the language for sure.

the upper picture is the screen from the editor, and the bottom one is from the real mobile screen.
As you can see, there is no space between the last text element and the upper element.
but on the real mobile screen, there is a big empty space between the two elements.

I couldn’t figure out why this is happening.
Plz help

Sincerely
Min Lee from South Korea

Hi Min Lee

I see your text is connected to a database. Is it possible that there is a gap in the text in the content manager?