WHen i scrolling the webpage some table are blankout in my webpage happens only in chrome based browser? [closed]

When ever i scroll my webpage in chrome or chromium based browser few tabs are become invisible or blank. it only not happen in Firefox help to sort it out or what i missed

Source code link: https://github.com/jbk005/jbk005.github.io

Video: https://github.com/jbk005/jbk005.github.io/blob/source/2021-01-20-11-04-57.gif

Thanks in advance