Same kind of problem happens with the TOTAL theme
I use Google Chrome and the space key jumps the page to the footer. Works fine on Firefox. I activated a different theme (WordPress 2016) and the problem goes away so it is a fault in the theme.
Ran a check through https://validator.w3.org/ which threw up plenty of errors in the code.
Sorry I haven’t a solution for the problem but it may be in the core PHP hasthemes are using.