Parallax Image On Mobile


Great theme I love what can be done with it! So far I notice quite a few bugs in it. The first thing that I’m unable to figure out even after reading quite a few threads on the topic, is the parallax image on mobile. I purchased images according to another thread, image size is over 2600 # 2000px. The image on mobile looks very bad, I tried doing a few things with Jetpack to no avail. Please assist.
My website is

Thank you

I was told to post this question on another theme thread, not sure why. But, here is the thread,
I’m using the Shapely Theme. And nothing is working for the parallax image size. Can someone please help???

Any advice?