Header / Menu jumps when scrolling down

I have a couple of sites that make use of the Sydney WP theme. Both of them have the following problem.

When you scroll down the sites, the header/menu bar jumps up and down.

Example here…

I have removed all my custom css with no change.
What can I do to stop the jumping glitch?

Hello there,

Do you find this problem also happens on our demo site? I checked your site, I didn’t find any issue as seen on the below screencast.

Cloudup

Maybe I missed something?

Regards,
Kharis

I am experiencing the same issue. On my homepage it works it scrolls smoothly but I can’t get to work on my other pages like here

The issue on your inner pages isn’t noticeable to me. Please take a video recording, then upload it to cloudup.com to share it in your reply.

Regards,
Kharis

`<img src=“http://https://cldup.com/2Qj9GIZdum.mp4” alt="scroll " />

<video width=“320” height=“240” autoplay>
<source src=“https://cldup.com/2Qj9GIZdum.mp4” type=“video/mp4”>
</video>

Sorry for spamming

Hello there,

Inspecting your site with the web browser’s console tool, I found an error which is produces by your Unite Gallery Lite plugin. This error probably breaks the smooth scrolling button behavior. To verify, please temporarily deactivate this plugin.

Regards,
Kharis

Hi
I deactivated the plugin and I’m still having the issue

Hi

I have the same problem… i tried deactivating all my plugins but no change
my website

Hello there,

Please try adding this extra CSS code to Appearance > Customize > Additional CSS from your site dashboard.



@media only screen and (min-width:1025px) {
  
  .site-header, 
  .site-header.fixed,
  .site-header.float-header {
    position: fixed !important;
  }
  
}

Regards,
Kharis