Submit Button Issue

Hi, I am not able to share the website, which is offline.

I create the form with:
[mb_frontend_form id="field_group_1,field_group_2,field_group_3" edit="true" post_fields="" post_type="custom_post_type" submit_button="Save"]

Then each field group is made with rwmb_meta_boxes filter.

I noticed the issue exists when I edit existing post. Empty form triggers submission without the issue.

I tried to disable other plugins and switch to default theme, but no change.
I also checked for any errors on form submission, but receiving no errors.
Currently I use tabs to preset fields, I tried to check for issues with tabs disabled, but still the problem exists.

Digging deeper and I could narrow down the issue reason to the remote parameter of the rules key.

Next, different browsers behave different way, depending on how many rules within validation key have remote parameter set up:

1. In Brave: When I have only single field with validation > rules > field_name > remote set to something like 'remote' => admin_url( 'admin-ajax.php?action=h29dk' ) the form works. However, adding second remote rule for another field (with different action name) causes the issue with the form submission. Two rules, one with remote parameter and one without, don't cause the issue.

2. Firefox: The issue exists already with only single rule with remote parameter.

Would be grateful for further tips on how this could be fixed in order to keep remote validation.

Now, the problem seems to be with the callback to the ajax request.

I have the following callback function set in 'remote' => admin_url( 'admin-ajax.php?action=test_request' ):

function test_function() {
	$title = $_GET['post_title'];

	if ( 65 >= mb_strlen( $title, 'UTF-8' ) ) {
		echo 'true';
	} else {
		echo 'false';
	}
	die;
}
add_action( 'wp_ajax_test_request', 'test_function' );

Testing it in Firefox gives the following results:

1. When I edit the post and click on Save without clicking inside any text fields the form submission doesn't trigger.
2. When I edit the post and before I click Save I click inside the title field (this field undergoes above validation), the form triggers submission. The title's validation works upon clicking inside the filed as expected (if the title is longer than 65 characters the validation fails, otherwise, the field is valid and the error message disappears).

If you still prefer to have the code I use to create the metabox, can we share it securely?

Thanks, hopefully this can be fixed.

Indeed Chrome seems to handle form submission with fewer problems than Brave and Firefox, according to the users of my website who were testing it in this browser, but Brave and Firefox also show differences in this matter.

Looking forward to hearing from you.

Hello guys, will the issue be addressed at all, or we should seek another solution?