As requested, I’m creating a new topic:
I noticed that something a couple things were off about the appearance of my site after the recent update, one being the fonts/typography. However, when I went to the fonts area of the customizer, as directed by the change log you posted and other similar support threads, the dropdowns did not display when I clicked on them, so it seems to be stuck on Raleway for both headings and body fonts. I checked your documentation here https://docs.athemes.com/article/110-selecting-fonts but my customizer is NOT behaving as the video shows.
I rolled back to one of my site backups to at least find out what fonts were set previously, which you can see here: http://www.awesomescreenshot.com/image/4563172/a4970f4d8926229289bc9033956345cd
Then, I returned to the updated version to set the fonts, until I realized it won’t even let me change them anyway!
The website I am working on is stantononline.com and here is a link to a screenshot: http://www.awesomescreenshot.com/image/4561979/85d2639aba6937cd7404b5e298eb723f
Notice that under body fonts, I pressed the dropdown and the arrow switched to pointing upward, but no options are displayed. It behaves the same for the heading fonts section, as well.
Side Note: I also had the issue of my homepage slider disappearing. I was able to fix it after reading your change log, but when I rolled back to a previous backup last night, there was nothing wrong with my settings for the header type. The update had actually removed the setting I had for the home page slider. It concerns me that an update can mess with a site this much.
I’m also running a child theme, but that didn’t seem to prevent any of these issues. This site has been going with hardly any maintenance for the past 3-4 years, so this update behavior boggles my mind.
After reading all the other similar support topics, I cleared my site’s cache, cleared my browser history, and tried an incognito tab without any luck. Here’s hoping you can help me get this straightened out!