When i refresh, the blank space disappears in inspect chrome

http://gh.pe.kr/realbread/index.html

it’s my practice page for html and css.
I have problem this page, it’s unknown right white blank in inspect chrome,
but if i refresh in inspect window, this problem go away…
I dont know why is this happening…
plz tell me reason and awesome solution…

I’m sorry I can’t speak English well,
and i’m happy to start github!!