Parallax image "jumping" effect in Chrome/Firefox iOS


I’m noticing a strange issue on a site I’ve built at On Chrome/Firefox in iOS, the background “jumps” or zooms upon scrolling. I have tried a few workarounds to no avail, and also see the same effect on the Shapely demo. Videos here for reference:

Has anyone seen this before? Is there a fix?


Hey there,
I hope you’re doing well today

Thank you for pointing this issue out, I’ll notify the developer of this issue.
You can follow the issue here:

Best Regards,