It’s totally not a comma
Using a comma in data can sometimes be tricky. WordPress taxonomies, I'm looking at you. Try this character instead.
workarounds
Why your Google fonts might not be loading in WordPress
A change in Google Fonts' URI structure for embedding combined fonts can lead to an incompatibility with WordPress.
How I fixed loading WP Google Maps Pro with Autoptimize
How I resolved an incompatibility between WP Google Maps Pro and Autoptimize plugins preventing maps from initializing correctly.