Background image flashes

my background image started to flash suddenly !!!
i know i must did smthing but i cant find what i did…
i also tried to go back 2-3 revisions but nothing change
here is the link

thanks in advance

Hello George,

You can try to temporarily deactivate all your plugins except Sydney Toolbox and Page Builder by SiteOrigin, and see if it helps.

Kind Regards, Roman.