Same problem here… and getting desperate…
Checked max_input_vars, nesting_levels, input_time… Also changed option_name to 255 chars… Nothing.
No errors neither in php logs, apache or mysql. No slow queries… I’ve debugged with save_post and acf/save_post and the array is complete in WP debug.log (it includes the not saved fields)… But they do not save to the DB…
This behavior started after adding a repeater field in a field group. I had a lot of custom posts with custom fields working fine. Then realized I needed one more repeater field and added to the field group… This made the fields stop saving…
Some magic would be greatly appreciated 🙂
Latest version of WordPress and ACFPro at this time.
