Have you ever run into problems with the Elementor Text Editor Widget not being able to change the font size, line spacing etc.? At first I investigated whether there was a conflict with the theme but that didn’t appear to be the case. Even setting all fonts back to default and disabling Elementor fonts in Elementor settings didn’t work.
This tiny piece of css added to WordPress/Customizer/Custom CSS did the trick.
.elementor-text-editor p{ font-size: inherit; line-height: inherit; letter-spacing: inherit; }
