Opening menu on mobile shifts page layout

Hi,

After opening and closing the menu on mobile, the entire page shifts left. It will eventually shift back after scrolling up and down a bit. Is there any way to fix this? I have already done the plugins test (turning off all one by one) and it is still happening.

I hope someone does reply as it seems like there has been no support on this theme for free users for over a year.

Thank you!

The page I need help with: [log in to see the link]