diff --git a/htdocs/core/class/html.formticket.class.php b/htdocs/core/class/html.formticket.class.php
index d7cf03c41e0..2bd674e1c99 100644
--- a/htdocs/core/class/html.formticket.class.php
+++ b/htdocs/core/class/html.formticket.class.php
@@ -2,6 +2,7 @@
 /* Copyright (C) 2013-2015  Jean-François FERRY     <hello@librethic.io>
  * Copyright (C) 2016       Christophe Battarel     <christophe@altairis.fr>
  * Copyright (C) 2019       Frédéric France         <frederic.france@netlogic.fr>
+ * Copyright (C) 2021       Juanjo Menent			<jmenent@2byte.es>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -503,7 +504,7 @@ class FormTicket
 					print ' selected="selected"';
 				} elseif ($selected == $id) {
 					print ' selected="selected"';
-				} elseif ($arraytypes['use_default'] == "1" && !$empty) {
+				} elseif ($arraytypes['use_default'] == "1" && !$selected && !$empty) {
 					print ' selected="selected"';
 				}
 
@@ -598,7 +599,7 @@ class FormTicket
 					print ' selected="selected"';
 				} elseif ($selected == $id) {
 					print ' selected="selected"';
-				} elseif ($arraycategories['use_default'] == "1" && !$empty) {
+				} elseif ($arraycategories['use_default'] == "1" && !$selected && !$empty) {
 					print ' selected="selected"';
 				}
 
@@ -699,7 +700,7 @@ class FormTicket
 					print ' selected="selected"';
 				} elseif ($selected == $id) {
 					print ' selected="selected"';
-				} elseif ($arrayseverities['use_default'] == "1" && !$empty) {
+				} elseif ($arrayseverities['use_default'] == "1" && !$selected && !$empty) {
 					print ' selected="selected"';
 				}
 
diff --git a/htdocs/ticket/list.php b/htdocs/ticket/list.php
index e9b36a2d364..91cefc88d42 100644
--- a/htdocs/ticket/list.php
+++ b/htdocs/ticket/list.php
@@ -362,7 +362,7 @@ foreach ($search as $key => $val)
 }
 if ($search_all) $sql .= natural_search(array_keys($fieldstosearchall), $search_all);
 if ($search_societe)     $sql .= natural_search('s.nom', $search_societe);
-if ($search_fk_project) $sql .= natural_search('fk_project', $search_fk_project, 2);
+if ($search_fk_project > 0) $sql .= natural_search('fk_project', $search_fk_project, 2);
 if ($search_date_start)			$sql .= " AND t.datec >= '".$db->idate($search_date_start)."'";
 if ($search_date_end)			$sql .= " AND t.datec <= '".$db->idate($search_date_end)."'";
 if ($search_dateread_start)		$sql .= " AND t.date_read >= '".$db->idate($search_dateread_start)."'";