The first section turn white when scroll back up after clicking an ahchor

[cR_BLue]

Hi, i created a code that have card stack animation and anchor link.

 

The animation when scroll to through manually or anchor link have no problem.

 

However after clicking an anchor link and when i try to scroll back up manually.  The first section (in this case  <div id="link1" class="homeFeature_section homeFeature_section01">) turn blank or white.

 

I cant recreate the situation in codepen but i copy paste the same code above. Can someone help?

server.js style.css

See the Pen WbrdMzp by Charles5BLueER (@Charles5BLueER) on CodePen.

[GSAP Helper]

Are you saying that the CodePen works correctly? You cannot provide a minimal demo that illustrates the issue? 

 

Without a minimal demo, it's very difficult to troubleshoot; the issue could be caused by CSS, markup, a third party library, a 3rd party script, etc. Would you please provide a very simple CodePen or Stackblitz that illustrates the issue? 

 

Make sure you DON'T have scroll-behavior: smooth on the body/html.