Bug after upgrading wordpress

Hello. After updating wordpress, it seems that my codes in a pod page turns into a mess whenever I click the update button.

For example:

<form method="get" class="" action="">
        <input name="type" value="books" type="hidden">

        <input class="" name="search" value="" type="text">

        <input class="" value="Search" type="submit">
</form>
<?php

$pod_books = pods( 'books' );

$params = array(
    'orderby' => 'book_year DESC',
    'limit' => 2,
    'search' => false,
    'where' => array(
         'relation' => 'OR',
          array(
             'key' => 'book_title',
             'value' => pods_var( 'search' ),
          ),
          array(
             'key' => 'book_author',
             'value' => pods_var( 'search' ),

          ),
          array(
             'key' => 'book_year',
             'value' => pods_var( 'search' ),
       )
));

echo $pod_books->find( $params )->template( 'book_detail' );

echo $pod_books->pagination();

?>

..will turn into this after clicking update:
(regardless whether I made any changes to the code or not)

<form method="get" class="" action="">rnrn <input class="" name="search" value="" type="text">rnrn <input class="" value="Search" type="submit">rn</form>rn<?phprnrn$pod_books = pods( 'books' );rnrn$params = array(rn 'orderby' => 'book_year DESC',rn 'limit' => 2,rn 'search' => false,rn 'where' => array(rn 'relation' => 'OR',rn array(rn 'key' => 'book_title',rn 'value' => pods_var( 'search' ),rn ),rn array(rn 'key' => 'book_author',rn 'value' => pods_var( 'search' ),rnrn ),rn array(rn 'key' => 'book_year',rn 'value' => pods_var( 'search' ),rn )rn));rnrnecho $pod_books->find( $params )->template( 'book_detail' );rnrnecho $pod_books->pagination();rnrn?>

The only way I can turn it to normal is by restoring a previous revision.

https://www.ads-software.com/plugins/pods/