@OSUblake Thanks Blake!
I'll have to dig into that article after dinner!
Since you've never ran into it before, would you happen to mainly use Chrome? If so, that is probably why.
Even the GSAP website itself has that warning - but it only appears in Firefox. If you open Firefox and go to the GSAP website, once you start scrolling down the page Firefox will give you the message.
I may be able to share a minimal demo, but if I did it would have to be after dinner. I'll watch the minimal demo video and see if I can't get one posted up. It's a Webpack project with a lot of modules and dependancies so I'm not sure if it's possible. Though it very well could be, I just have no experience with CodePen or anything like that.