yes, it seems Elementor global colors and fonts SHOULD NOT be stored with each Style Kit.
Regardless the SK the user is using, the Elementor global colors and fonts must be available (like it was initially).
Otherwise any elements that have these global fonts or colors on them, they break when you change SK.
Our SK colors panel though, can and should be stored on the SK - John
Let's revise it as discussed on slack - https://analogwp.slack.com/archives/CJ72D4S03/p1653891471681499