CSS styles in Gutenberg/Cwicly editor

I had WP Codebox reflecting the CSS changes in the Gute/Cwicly editor and the front end just like it’s supposed to. But, I’ve noticed I can only seem to get that working about half the time. The changes show on the front, but the editor seems picky about when it wants to work properly. I’m also having problems with Cwicly sometimes not applying styles that are clearly in the Cwicly style sheet (green light on) the class is showing that it’s been applied to a given element in the dev tools but not the associated styles. Are these sorts of issues common?