diff --git a/filemanager/inc/class.filemanager_ui.inc.php b/filemanager/inc/class.filemanager_ui.inc.php
index e32898bb77..ef03ce3063 100644
--- a/filemanager/inc/class.filemanager_ui.inc.php
+++ b/filemanager/inc/class.filemanager_ui.inc.php
@@ -1264,6 +1264,7 @@ class filemanager_ui
 							static $name2cmd = array('uid' => 'chown','gid' => 'chgrp','perms' => 'chmod');
 							$cmd = array('EGroupware\\Api\\Vfs',$name2cmd[$name]);
 							$value = $name == 'perms' ? static::perms2mode($content['perms']) : $content[$name];
+							if(!$value) continue;
 							if ($content['modify_subs'])
 							{
 								if ($name == 'perms')
@@ -1276,11 +1277,14 @@ class filemanager_ui
 									$changed = Vfs::find($path,null,$cmd,array($value));
 								}
 								$ok = $failed = 0;
-								foreach($changed as &$r)
+								foreach($changed as $sub_path => &$r)
 								{
 									if ($r)
 									{
 										++$ok;
+										// Changing owner does not change mtime.  Clear subs on UI so they get reloaded
+										if($sub_path == $path) continue;
+										Api\Json\Response::get()->apply('egw.dataStoreUID',['filemanager::'.$sub_path,null]);
 									}
 									else
 									{