Inertial scrolling with a trackpad on safari/mac os is the behavior, that scrolling does not just stop when you lift the fingers. But the site scrolls a bit further. Not having it for the users makes it feel like the site is broken.
All websites:
The odoo.com product website
All website build with the website builder
Even the forum (here)
Has intertial scrolling for safari broken. This seems to be some java script code that blocks it, because it initially work, until more content is loaded (see also: https://stackoverflow.com/questions/68064012/how-to-stop-inertial-scrolling-in-a-web-app )