diff --git a/addons/point_of_sale/static/src/js/field_text_html.js b/addons/point_of_sale/static/src/js/field_text_html.js
new file mode 100644
index 00000000000..27b378801c9
--- /dev/null
+++ b/addons/point_of_sale/static/src/js/field_text_html.js
@@ -0,0 +1,20 @@
+odoo.define('point_of_sale.fieldtexthtml', function (require) {
+    'use strict';
+
+    var FieldTextHtml = require('web_editor.backend').FieldTextHtml;
+
+    FieldTextHtml.include({
+        // avoid '414 Request-URI Too Large' errors to
+        // /point_of_sale/field/customer_facing_display_template by
+        // filtering out biggest fields
+        getDatarecord: function () {
+            var datarecord = this._super();
+            if (this.model === 'pos.config') {
+                datarecord = _.omit(datarecord, function (val, key) {
+                    return _.isObject(val) || key === 'customer_facing_display_html';
+                });
+            }
+            return datarecord;
+        },
+    });
+});
diff --git a/addons/point_of_sale/views/pos_templates.xml b/addons/point_of_sale/views/pos_templates.xml
index 79a214758d7..110b3fd03d2 100644
--- a/addons/point_of_sale/views/pos_templates.xml
+++ b/addons/point_of_sale/views/pos_templates.xml
@@ -72,6 +72,12 @@
     </script>
 </template>
 
+<template id="pos_editor_fieldtexthtml_assets" inherit_id="web.assets_backend">
+    <xpath expr="." position="inside">
+        <script type="text/javascript" src="/point_of_sale/static/src/js/field_text_html.js"/>
+    </xpath>
+</template>
+
 <template id="pos_editor_assets" inherit_id="web_editor.assets_editor">
     <xpath expr="//script[last()]" position="after">
         <script type="text/javascript" src="/point_of_sale/static/src/js/pos.web_editor.js"/>