diff --git a/hypha/apply/determinations/templates/determinations/base_determination_form.html b/hypha/apply/determinations/templates/determinations/base_determination_form.html
index 947c1fe4ef7c4f754a05cbe112a6f90ca0f2ae3e..510c1d5538dccbe892b9cb13298ef2951400c00b 100644
--- a/hypha/apply/determinations/templates/determinations/base_determination_form.html
+++ b/hypha/apply/determinations/templates/determinations/base_determination_form.html
@@ -60,5 +60,6 @@
 {% endblock %}
 
 {% block extra_js %}
+    {{ field_blocks_ids|json_script:"block-ids" }}
     <script src="{% static 'js/apply/determination-template.js' %}"></script>
 {% endblock %}
diff --git a/hypha/apply/determinations/views.py b/hypha/apply/determinations/views.py
index c75fd11952e5a7ef1aef4f83cf36ca1416eefa30..f325371ce105ec524826b7149527f4c4581cfae7 100644
--- a/hypha/apply/determinations/views.py
+++ b/hypha/apply/determinations/views.py
@@ -308,9 +308,14 @@ class DeterminationCreateOrUpdateView(BaseStreamForm, CreateOrUpdateView):
         site = Site.find_for_request(self.request)
         determination_messages = DeterminationMessageSettings.for_site(site)
 
+        field_blocks_ids = {}
+        for field_block in self.get_defined_fields():
+            field_blocks_ids[field_block.block_type] = field_block.id
+
         return super().get_context_data(
             submission=self.submission,
             message_templates=determination_messages.get_for_stage(self.submission.stage.name),
+            field_blocks_ids=field_blocks_ids,
             **kwargs
         )
 
diff --git a/hypha/static_src/src/javascript/apply/determination-template.js b/hypha/static_src/src/javascript/apply/determination-template.js
index 092e2ce552c32ecfc727b4fd93ecbfac973dca42..a243faa3de98b2fa93ce49848161953900fe9b66 100644
--- a/hypha/static_src/src/javascript/apply/determination-template.js
+++ b/hypha/static_src/src/javascript/apply/determination-template.js
@@ -1,10 +1,11 @@
 (function ($) {
 
     'use strict';
+    const field_blocks_ids = JSON.parse(document.getElementById('block-ids').textContent);
 
     let DeterminationCopy = class {
         static selector() {
-            return '#id_outcome';
+            return ('#id_' + field_blocks_ids['determination']);
         }
 
         constructor(node) {
@@ -32,7 +33,8 @@
         }
 
         updateTextArea(text) {
-            window.tinyMCE.get('id_message').setContent(text);
+            this.message_box = document.querySelector('#id_' + field_blocks_ids['message'] + '_ifr');
+            this.message_box.contentDocument.getElementsByTagName('body')[0].innerHTML = text;
         }
     };