Page shift to left

Hi everyone.
When i open my site on mobile, the page shift to the left and is much smaller. This is only last for 2-3 seconds and then moves back to the centre of the page as it should be. Can't figure out why. Also another problem I encountered is. When I open my site there is always a space between the full width navbar and the full width image below. This again happens for few seconds and then the gap closes by itself and all back to normal. Any help will be greatly appreciated as I tried and double checked anything I can think of, but I don't seem to be able to find what is causing this. Thanks again

Check your pasteboard area for the mobile and see if you have any content there. Sometimes in the past this could cause a mobile page to not be centered.

I don't have any idea what is going on with the main site. But check back to see if someone has a another or better explanation.