After speeding up the internet the Next hyperlink button not working at times

The web site had a Next button on a page called 'Page A' (Name chnged) The page had a button with a link to take it to a next page or a pop up option

after speeding it up it does not work at times - but aftera while it worked

If the reason is mystery or spiritual then please ignore - if it is a material reason, then, please explain