if the Body Overflow is set to Visible. You can’t see the horizontal scrollbar in the Designer.
But it appears on the live site (https://hugo-ngai.webflow.io/).
There is what I have tested and found:
in order to identify which selection causes this issue.
I have changed the Body Overflow from Visible to Scroll.
Then scroll down to the bottom of the site, and the horizontal scrollbar appears.
Deleted the “track” section, the horizontal scrollbar is gone.
Looks like the “photo-items” causes this issue, but I don’t know how can I fix it.