I’m not on Genesis on either site TinyMCE is installed on, and I’m admin for both of them.
Adamas theme: https://ow.ly/wn4Xd
Savia theme: https://ow.ly/wn53H
The site with Adamas has more active plugins and I was pretty much done with it when I found your plugin. It was one of the first plugins I added to the Savia theme that didn’t come with the theme. Woocommerce updated in between but it doesn’t appear to be causing issues.
Turning off plugins didn’t bring up the “Add A Color” selection either.
* Updated*
It does work with the default theme installed on the Savia site, so something is going on when I activate the theme we need to use for the client.