www.vrt.be - see bug description

[webcompat-bot]

URL: https://www.vrt.be/vrtnu/

Browser / Version: Firefox Mobile 64.0
Operating System: Android 8.1.0
Tested Another Browser: Yes

Problem type: Something else
Description: scrolling issue
Steps to Reproduce:

From webcompat.com with ❤️

[denschub]

Scrolling seems to somehow scroll the images as well, but only in Firefox. Works fine in Chrome.

[karlcow]

funky! Another funny thing is that it doesn't reproduce on Responsive design mode with touch enabled and Firefox Android UA. It's very specific to the device.

<div class="tile__image-wrapper">
  <div class="tile__image">
    <picture class="">
      <!--[if IE 9]><video style="display: none"><![endif]-->
      <source srcset="//images.vrt.be/VV_21x9_1200/2018/09/19/b7f54def-bbed-11e8-abcc-02b7b76bf47f.jpg 1x, //images.vrt.be/VV_21x9_2400/2018/09/19/b7f54def-bbed-11e8-abcc-02b7b76bf47f.jpg 2x" media="(min-width: 1024px)">
      <source srcset="//images.vrt.be/VV_21x9_1000/2018/09/19/b7f54def-bbed-11e8-abcc-02b7b76bf47f.jpg 1x, //images.vrt.be/VV_21x9_2000/2018/09/19/b7f54def-bbed-11e8-abcc-02b7b76bf47f.jpg 2x" media="(min-width: 768px)">
      <!--[if IE 9]></video><![endif]-->
      <img srcset="//images.vrt.be/VV_16x9_800/2018/09/19/b7f54def-bbed-11e8-abcc-02b7b76bf47f.jpg 1x, //images.vrt.be/VV_16x9_1600/2018/09/19/b7f54def-bbed-11e8-abcc-02b7b76bf47f.jpg 2x" alt="" class="image   " onerror="if(this.parentNode) { this.parentNode.classList.add('image--error');this.parentNode.classList.remove('image--loading'); }" onload="if(this.parentNode) { this.parentNode.classList.remove('image--loading'); }">
    </picture>
  </div>
</div>

[karlcow]

in https://www.vrt.be/etc/designs/vrtvideo/clientlib-site.min.ae77e7ca8fb1a9e45c81974cd2961aa6.js
there's a lot of things which are about scrolling and touch interactions.

@birtles helped me. And he mentioned it could be related to https://bugzilla.mozilla.org/show_bug.cgi?id=1459312 but no guarantee.

@theres-waldo what do you think?

[theres-waldo]

Loading the site in a debug build of Firefox for Android trips this assertion; the bug may well be caused by / related to that.

[karlcow]

Thanks.

[karlcow]

Close as duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=1427792