Scrolling error

Hi

I am seeing issues in both my posts, and separate pages such as “About” where I cannot scroll down all the way to the Footer menu. Basically, its a continuous scroll as you go down the page, and you see the Footer and bottom menu flash along as you scroll, looks like a glitch, but it never reaches the bottom. It happens off and on on mine and other’s desktop PCs, yet seems to work fine and without this error on Mobile devices. Let me know if there is a fix please!

Thanks