I have recently upgraded my site to X-Theme 10.3.7, Cornerstone 7.3.7 and WordPress 6.3.
My site is built upon the Renew stack and makes extensive use of the Classic content elements.
For an unknown reason, the upgrades have caused the fonts to go to a Serif font whereas the Renew stack sets both the Body and Header fonts to “Helvetica” (a sans-serif font). The Theme Settings still show Helvetica as the font for both the Body Copy and the Headings.
Note that I am also seeing the following error message, within Cornerstone. Maybe there is a connection?:
“Warning: Undefined array key 4 in /home/sites/spencersbutchers.com/public_html/wp-content/plugins/cornerstone/includes/_classes/classic/class-legacy-renderer.php on line 170”
The site in question is spencersbutchers.com