I am not sure if this a theme issue – it could also be Elementor/child theme/plugin, but suddenly lots of headings and text are weird sizes, fonts and colours. Looks terrible, please help!
I cannot tell what is right or wrong and there are no CSS errors appearing and it looks like all the typography has been styled in Elementor so doubtful its Theme related.
Things to try:
1. Clear and Disable the Cache plugin to see if the CSS has been incorrectly ordered.
2. Rebuild Elementor CSS – Dashboard > Elementor > Tools –> Rebuild CSS.