DeLayDesign's post in Sudden and seemingly unprovoked lag was marked as the answer
I took a more drastic approach.
I uninstalled Chief 126.96.36.199(the newest update) and re-installed the previous version (188.8.131.52)... and all the issues I had went away. I now have zero lag!
I have informed Chief about the issue. I think they may need to issue a patch, but I'm going to stick to 184.108.40.206 until they can confirm the issue is resolved.