Bug in GFAPI::get_entries search criteria

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Hey, I have registered one entry meta for custom use in my code.

For the register entry meta, I have written this code in the themes functions.php file.

Code Snippet :

    add_filter( 'gform_entry_meta', function ( $entry_meta, $form_id ) {
    	 $entry_meta['lms_status'] = array(
    	 'label' => 'lms_status',
    	 'is_numeric' => false,
    	 'update_entry_meta_callback' => 'update_entry_meta_test',
    	 'is_default_column' => false,
    	 'filter' => array(
    	 'key' => 'lms_status',
    	 'text' => 'lms_status',
    	 'operators' => array(
    	 'is',
    	 'isnot',
    	 )
    	 ),
    	 );
    	 
    	 return $entry_meta;
    	}, 10, 2 );

Below I have written some of the search criteria in my template file for fetch result combination of entry meta key = ‘success’ & lms_status = ‘fail’

Code Snippet :

<?php
	/**
	 * The main template file
	 *
	 * Template name: test
	 * 
	 */
$search_criteria = array(
	 'field_filters' => array(
	 array( 'key' => 'payment_status', 'value' => 'Paid' ),
	 array( 'key' => 'lms_status', 'operator' =>'is', 'value' => 'fail')
	 )
	);
	$sorting = array();
	$paging = array( 'offset' => 0, 'page_size' => 3000);
	$entries = GFAPI::get_entries( 5, $search_criteria , $sorting, $paging);
	echo('<pre>');
	echo('ENTRY_COUNT '.count($entries));
	echo('<br>');
	 
	foreach($entries as $entry) {
	 echo('Entry '.$entry['id'] );
	 echo('--');
	 echo('status '.$entry['lms_status']);
	 echo('<br>');
	 }

By the above code expected output is fail entries with meta key = ‘lms_status’ & value = ‘fail’ but it returns fail as well as succeded entries.

Output:
ENTRY_COUNT 88
Entry 4561–status fail
Entry 4553–status success
Entry 4523–status success
Entry 4446–status success
Entry 4413–status success
Entry 4403–status success
Entry 4368–status success
Entry 4333–status success
Entry 4330–status success
Entry 4320–status success
Entry 4319–status success
Entry 4147–status success
Entry 3963–status success
Entry 3842–status success
Entry 3743–status success
Entry 3702–status success
Entry 3685–status success
Entry 3682–status success
Entry 3670–status success
Entry 3589–status success
Entry 3489–status success
Entry 3470–status success
Entry 3468–status success
Entry 3439–status success
Entry 3387–status success
Entry 3340–status success
Entry 3317–status success
Entry 3297–status success
Entry 3275–status success
Entry 3274–status success
Entry 3268–status success
Entry 3267–status success
Entry 3266–status success
Entry 3264–status success
Entry 3263–status success
Entry 3261–status success
Entry 3258–status success
Entry 3257–status success
Entry 3252–status success
Entry 3244–status success
Entry 3242–status success
Entry 3229–status success
Entry 3216–status success
Entry 3182–status success
Entry 3148–status success
Entry 3055–status success
Entry 3053–status success
Entry 2954–status success
Entry 2936–status success
Entry 2919–status success
Entry 2707–status fail
Entry 2695–status success
Entry 2656–status fail
Entry 2654–status success
Entry 2511–status success
Entry 2392–status fail
Entry 2320–status success
Entry 2310–status success
Entry 2292–status success
Entry 2274–status success
Entry 2078–status success
Entry 1959–status success
Entry 1818–status success
Entry 1804–status success
Entry 1728–status fail
Entry 1725–status fail
Entry 1671–status success
Entry 1628–status fail
Entry 1567–status success
Entry 1506–status success
Entry 1479–status fail
Entry 1469–status success
Entry 1453–status success
Entry 1413–status success
Entry 1367–status success
Entry 1094–status success
Entry 1000–status success
Entry 939–status success
Entry 583–status fail
Entry 579–status success
Entry 465–status fail
Entry 414–status success
Entry 362–status success
Entry 354–status success
Entry 182–status success
Entry 139–status success
Entry 135–status success
Entry 72–status success