side-effect with other plugin

Hello,
this plugin has a side-effect in the following situation:

i have managed WordPress-site:
i use the plugin:
Custom CSS & JS Settings

and have a JS-Code:

function backClick() {
	if (document.referrer.indexOf(window.location.host) !== -1) {
	history.go(-1);return false;
	}
	else { window.location.href = 'https://schoblatt.de'; }
    }

When a user comes from a external link, from mail for example,
then there is no history and when he click to the back button,
the user is landing on the homepage.
When a user comes from a internal site and click the back button he goes back exactly from where he came.

Then in the other plugin:
PRyC WP: Add custom content to top/bottom of post

the code for the button in the frontend:
<input type=”button” value=”Zurück” onclick=”backClick()”; />

when i activate in your plugin: “internal links”
then the code above fails.
the user is landing every-time on the homepage and not from where he came.

When i disable “Internal links” in your plugin all works fine.

————————————–

WordPress-URL:  https://schoblatt.de
WordPress-Version:  5.7.2
PHP-Version:  7.4.18
Aktivierte Plugins:
 - 301 Redirects, version: 2.70
 - Advanced Editor Tools (previously TinyMCE Advanced), version: 5.6.0
 - Antispam Bee, version: 2.9.4
 - ARI Fancy Lightbox, version: 1.3.8
 - Bounce Handler Mailpoet, version: 1.3.21
 - Broken Link Checker, version: 1.11.15
 - Catch Breadcrumb, version: 1.5.9
 - Code Widget, version: 1.0.13
 - Disable Google Fonts, version: 2.0
 - Disable REST API, version: 1.6
 - Display Posts, version: 3.0.2
 - EditorsKit, version: 1.29.3
 - Email Encoder - Protect Email Addresses, version: 2.1.1
 - EWWW Image Optimizer, version: 6.1.5
 - GD Security Headers, version: 1.5
 - Google XML Sitemaps, version: 4.1.1
 - Health Check & Troubleshooting, version: 1.4.5
 - Ivory Search, version: 4.6.4
 - LH Fresh Content, version: 1.10
 - Limit Login Attempts Reloaded, version: 2.22.1
 - Loco Translate, version: 2.5.2
 - MailPoet 3 (New), version: 3.62.1
 - MailPoet 3 Premium (New), version: 3.62.0
 - Mobile Menu, version: 2.8.2.2
 - My Custom Functions, version: 4.49
 - Options for Twenty Seventeen, version: 2.3.8
 - Posts in Sidebar, version: 4.15.1
 - Print-O-Matic, version: 1.7.14
 - PRyC WP: Add custom content to post and page (top/bottom), version: 2.6.5
 - Reading Progress Bar, version: 1.2.3
 - Remove XMLRPC Pingback Ping, version: 1.3
 - Reset Customizer, version: 1.0.8
 - Responsive Sidebar, version: 1.2.2
 - Reveal IDs, version: 1.5.4
 - SEOPress, version: 4.7.0.1
 - Shariff Wrapper, version: 4.6.5
 - Shortcode Widget, version: 1.5.3
 - Simple Custom CSS and JS, version: 3.36
 - Smart User Slug Hider, version: 4.0.1
 - Statify, version: 1.8.2
 - Statify – Extended Evaluation, version: 2.6.1
 - Taxonomy Dropdown Widget, version: 2.3.1
 - UpdraftPlus - Backup/Restore, version: 1.16.56
 - Very Simple Event List, version: 12.7
 - Website Security Check, version: 1.2.00
 - Widget Context, version: 1.3.2
 - WP-Font-Resizer, version: 2.3
 - WP-Optimize - Clean, Compress, Cache, version: 3.1.9
 - wp-Typography, version: 5.7.2
 - WP External Links, version: 2.48
 - WP Rollback, version: 1.7.1
 - XV Random Quotes, version: 1.37

WP External Links - Einstellungen:
array(
'wpel-external-link-settings' => array (
  'apply_settings' => '1',
  'target' => '_self',
  'target_overwrite' => '1',
  'rel_follow' => 'follow',
  'rel_follow_overwrite' => '1',
  'rel_noopener' => '1',
  'rel_noreferrer' => '1',
  'rel_external' => '1',
  'rel_sponsored' => '',
  'rel_ugc' => '',
  'title' => '{title}',
  'class' => 'sb_extlink',
  'icon_type' => '',
  'icon_image' => '1',
  'icon_dashicon' => 'dashicons-menu',
  'icon_fontawesome' => 'fa-address-book',
  'icon_position' => 'right',
  'no_icon_for_img' => '1',
),
'wpel-internal-link-settings' => array (
  'apply_settings' => '',
  'target' => '_self',
  'target_overwrite' => '',
  'rel_follow' => 'follow',
  'rel_follow_overwrite' => '1',
  'rel_noopener' => '1',
  'rel_noreferrer' => '1',
  'title' => '{title}',
  'class' => 'sb_intlink',
  'icon_type' => '',
  'icon_image' => '1',
  'icon_dashicon' => 'dashicons-menu',
  'icon_fontawesome' => 'fa-address-book',
  'icon_position' => 'right',
  'no_icon_for_img' => '1',
),
'wpel-excluded-link-settings' => array (
  'apply_settings' => '1',
  'target' => '',
  'target_overwrite' => '',
  'rel_follow' => 'follow',
  'rel_follow_overwrite' => '',
  'rel_noopener' => '1',
  'rel_noreferrer' => '1',
  'title' => '{title}',
  'class' => 'sb_ignlink',
  'icon_type' => '',
  'icon_image' => '1',
  'icon_dashicon' => 'dashicons-menu',
  'icon_fontawesome' => 'fa-address-book',
  'icon_position' => 'right',
  'no_icon_for_img' => '1',
),
'wpel-exceptions-settings' => array (
  'apply_all' => '1',
  'apply_post_content' => '1',
  'apply_comments' => '1',
  'apply_widgets' => '1',
  'skip_post_ids' => '',
  'ignore_classes' => 'site-branding-text, site-title, navigation-top, menu-item, entry-title',
  'subdomains_as_internal_links' => '',
  'include_urls' => '',
  'exclude_urls' => '',
  'excludes_as_internal_links' => '',
  'ignore_script_tags' => '1',
  'ignore_mailto_links' => '1',
),
'wpel-admin-settings' => array (
  'own_admin_menu' => '1',
),
);

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