I edit an article via Joomla admin, select a style from the editor's style dropdown (a class from the template that defines color), and when I close the style dropdown, my selected option isn't preserved (ie: it's not added to the HTML).

See : https://www.dropbox.com/s/wlz2ka68yoakuaz/JCE%20Issue%202019-12-16_12-45-01.MP4?dl=0

And then, upon another search of the forums, I found this:
https://www.joomlacontenteditor.net/support/forum/102257

Which resolved my issue too.