Ok, I resolved it with assistance from a coworker who noticed that the Field Group names were similar so I dug deeper and found that some meta field names were the same in two separate Field Groups, both on the same Page/Post.
🙂
I have multiple field groups for Pages & Posts. One of them saves fine while the other does not.
The main difference between the two is repeater/flexible content.
It is not saving in the DB as “get_field” isn’t getting any info.
Two screenshots of before/after save.
I’m having this issue with this as well, particularly with repeater/flexible content fields.
Edit: It actually might be saving in the DB (I’ll have to test/check front end once it’s coded) but the data is definitely not showing on the Edit Page screen.