Hello, Wade Yang,
Thank you for contacting us and for using XStore.
The problem is caused by an option of 3rd party plugin on your site.
If you do not want to disable plugins, find a plugin, like a cache or optimizer, and try to disable lazy loading for images there.
If you can’t find it, you need to disable plugins one by one to find out which one causes the problem.
Kind Regards,
8theme team