UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Example URL:
http://www.diamondpaintingiowa.com/index.html

Steps to reproduce the problem:
1. Go to site
2. Attempt to scroll up/down using mouse 

What is the expected behavior?
When using a mouse wheel (up/down) the page should scroll without the use of the sidebar.  I'm finding other sites on the web with similar behavior so I know its not isolated.

What went wrong?
The following sites do not scroll with Chrome:

http://www.diamondpaintingiowa.com/index.html
https://www.culverslandscape.com/

The following sites do scroll okay:

http://www.fletcoconstruction.com/
http://www.idsdroneinspection.com/

I am using Chrome Version 63.0.3239.132 (Official Build) (64-bit).  I believe it may be something with JQuery, though I see two sites using the same JQuery, so I'm lost.  Please advise.  

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes Not sure the exact version

Does this work in other browsers? Yes

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 10.0
Flash Version: