diff --git a/application/models/system/Message_model.php b/application/models/system/Message_model.php
index 3a5579cc7..19129b606 100644
--- a/application/models/system/Message_model.php
+++ b/application/models/system/Message_model.php
@@ -255,7 +255,7 @@ class Message_model extends DB_Model
 				group by
 					m.message_id, m.person_id, mr.person_id
 
-				union
+				union all
 
 				select
 					m.message_id, m.person_id as sender_id, mr.person_id as recipient_id
diff --git a/public/js/components/Messages/Details/TableMessages.js b/public/js/components/Messages/Details/TableMessages.js
index a55ddec63..6a4cf5ca0 100644
--- a/public/js/components/Messages/Details/TableMessages.js
+++ b/public/js/components/Messages/Details/TableMessages.js
@@ -243,6 +243,7 @@ export default {
 						title: this.$p.t('global', 'aktionen')
 												});
 						*/
+						this.$emit('tabulator_tablebuilt');
 					}
 				},
 				{
diff --git a/public/js/components/Messages/Messages.js b/public/js/components/Messages/Messages.js
index 1f9afcb9e..5e247ddb5 100644
--- a/public/js/components/Messages/Messages.js
+++ b/public/js/components/Messages/Messages.js
@@ -56,6 +56,7 @@ export default {
 	},
 	data() {
 		return {
+			tablebuilt: false,
 			isVisibleDiv: false,
 			messageId: null
 		}
@@ -139,8 +140,10 @@ export default {
 		},
 		resetMessageId(){
 			this.messageId = null;
+		},
+		tableBuilt: function() {
+			this.tablebuilt = true;
 		}
-
 	},
 	template: `
 	<div class="core-messages h-100 pb-3">
@@ -155,6 +158,7 @@ export default {
 		</form>
 
 		<message-modal
+			v-if="tablebuilt"
 			ref="modalMsg"
 			:type-id="typeId"
 			:id="id"
@@ -166,8 +170,9 @@ export default {
 		</message-modal>
 		
 		<!--in same page-->
-		<div v-show="isVisibleDiv" class="overflow-auto m-3" style="max-height: 500px; border: 1px solid #ccc;">
+		<div v-if="isVisibleDiv" class="overflow-auto m-3" style="max-height: 500px; border: 1px solid #ccc;">
 			<form-only
+				v-if="tablebuilt"
 				ref="templateNewDivMessage"
 				:type-id="typeId"
 				:id="id"
@@ -187,6 +192,7 @@ export default {
 				:openMode="openMode"
 				@newMessage="handleMessage"		
 				@replyToMessage="handleMessage"
+				@tabulator_tablebuilt="tableBuilt"
 			>		
 			</table-messages>
 		</div>
diff --git a/system/dbupdate_3.4.php b/system/dbupdate_3.4.php
index 793930243..4ddb38203 100644
--- a/system/dbupdate_3.4.php
+++ b/system/dbupdate_3.4.php
@@ -91,6 +91,7 @@ require_once('dbupdate_3.4/69065_Projektarbeiten_Firmen_verwalten.php');
 require_once('dbupdate_3.4/68744_StV_settings.php');
 require_once('dbupdate_3.4/62889_reihungstest_ueberwachung_mit_constructor.php');
 require_once('dbupdate_3.4/71399_dashboard_update_widget_paths.php');
+require_once('dbupdate_3.4/71645_studvw_messagetab_ladezeit.php');
 
 // *** Pruefung und hinzufuegen der neuen Attribute und Tabellen
 echo '<H2>Pruefe Tabellen und Attribute!</H2>';
diff --git a/system/dbupdate_3.4/71645_studvw_messagetab_ladezeit.php b/system/dbupdate_3.4/71645_studvw_messagetab_ladezeit.php
new file mode 100644
index 000000000..4ad88fba9
--- /dev/null
+++ b/system/dbupdate_3.4/71645_studvw_messagetab_ladezeit.php
@@ -0,0 +1,28 @@
+<?php
+if (! defined('DB_NAME')) exit('No direct script access allowed');
+
+if ($result = $db->db_query("SELECT * FROM pg_class WHERE relname='idx_tbl_msg_message_person_id'"))
+{
+	if ($db->db_num_rows($result) == 0)
+	{
+		$qry = "CREATE INDEX idx_tbl_msg_message_person_id ON public.tbl_msg_message USING btree (person_id)";
+
+		if (! $db->db_query($qry))
+			echo '<strong>idx_tbl_msg_message_person_id: ' . $db->db_last_error() . '</strong><br>';
+		else
+			echo 'Index idx_tbl_msg_message_person_id angelegt<br>';
+	}
+}
+
+if ($result = $db->db_query("SELECT * FROM pg_class WHERE relname='idx_tbl_msg_recipient_person_id'"))
+{
+	if ($db->db_num_rows($result) == 0)
+	{
+		$qry = "CREATE INDEX idx_tbl_msg_recipient_person_id ON public.tbl_msg_recipient USING btree (person_id)";
+
+		if (! $db->db_query($qry))
+			echo '<strong>idx_tbl_msg_recipient_person_id: ' . $db->db_last_error() . '</strong><br>';
+		else
+			echo 'Index idx_tbl_msg_recipient_person_id angelegt<br>';
+	}
+}