Hi,
Sorry for late reply. I had a personal problem yesterday and couldn't be online.
I've just read your reply and I think max_input_vars
makes sense. It's the PHP configuration, which limits the number of variables submitted via $_POST
. By default, this number is set to 1000. If you have a lot of groups (clones), with many fields inside each clone, the total variables might be greater than 1000. Also note that the number of variables includes WordPress variables (title, categories, post status, etc.).
This is a good discussion on StackOverflow about this problem. I think, rewrite the code to reduce number of fields / inputs is a good way to get rid of this issue. Or you can try increasing the max_input_vars
.