content reloading issue with iPhone6 and iPhone6 Plus

[ghost]

Viewing the following site on Desktop, Android or iPad is fine because the devices have high RAM.
However, on iPhone6 and iPhone6 Plus, it is very flashing, and the content is consistently reloading when scrolling up and down.
If I do away with lazy-loading, the issue is gone.

https://www.irvinecompanyapartments.com/locations/orange-county/irvine/spectrum/the-park.html

Possibly relates to CPU issue.
#122

It seems like in the JS library, there is a watcher script/method observing whether the user scrolls and comes close to the range for the images to unveil. Any thought or inputs?