The scroll wheel on my mouse doesn't seem to be working on DLP anymore. I haven't noticed issues on any other website or program so I don't believe its related to hardware in anyway.

Any ideas on what could be causing this or further info I can provide to solve it?

 

I've read that certain browser extensions can issues with scrolling that only show up on certain sites. You may want to try disabling all of your extensions. If that fixes it you can then narrow down the extensions and replace the problematic extension with something else.

Other reasons I've seen include bugs in OS X (if you're on a Mac), and some issues with multiple monitors where detaching the secondary monitors from the computers and then reattaching them fixed the issue.

Good luck.