An update to my previous post from May 1st:
The issue seems to have resolved itself. I am not sure what had changed or if it was something that was happening on the server/PHP at the time.
Same issue here, but with a ‘time-picker’ field.
I tried changing the field to ‘text’ and I had the same issue – it would not store data. All other fields work OK.
Additional info:
I’m on Custom Fields version 5.8.9
The field that is not saving was the first field I created.
I can write data direct into the database and see it in my post. But if I edit the data and update the post, the data it disappears.