diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index fb78c8d1af5..3b4af2c3c8e 100644
--- a/htdocs/comm/action/class/actioncomm.class.php
+++ b/htdocs/comm/action/class/actioncomm.class.php
@@ -1644,8 +1644,10 @@ class ActionComm extends CommonObject
 		}
 		if (!empty($this->note_private)) {
 			$tooltip .= '<br><br><b>'.$langs->trans('Description').':</b><br>';
-			$texttoshow = dolGetFirstLineOfText($this->note_private, 10);
+			$texttoshow = dolGetFirstLineOfText($this->note_private, 10);	// Try to limit length of content
+			$tooltip .= '<div class="tenlinesmax">';						// Restrict height of content into the tooltip
 			$tooltip .= (dol_textishtml($texttoshow) ? str_replace(array("\r", "\n"), "", $texttoshow) : str_replace(array("\r", "\n"), '<br>', $texttoshow));
+			$tooltip .= '</div>';
 		}
 		$linkclose = '';
 		//if (!empty($conf->global->AGENDA_USE_EVENT_TYPE) && $this->type_color)
diff --git a/htdocs/core/class/html.formactions.class.php b/htdocs/core/class/html.formactions.class.php
index 6342e08a34e..e1731984229 100644
--- a/htdocs/core/class/html.formactions.class.php
+++ b/htdocs/core/class/html.formactions.class.php
@@ -271,12 +271,10 @@ class FormActions
 						break;
 					}
 
-					$ref = $actioncomm->getNomUrl(1, -1);
-
 					print '<tr class="oddeven">';
 
 					// Ref
-					print '<td class="nowraponall">'.$ref.'</td>';
+					print '<td class="nowraponall">'.$actioncomm->getNomUrl(1, -1).'</td>';
 
 					// Onwer
 					print '<td class="nowraponall tdoverflowmax125">';
@@ -310,7 +308,7 @@ class FormActions
 							$labeltype .= ' - '.$arraylist[$actionstatic->code]; // Use code in priority on type_code
 						}
 					}
-					print '<td class="tdoverflowmax100" title="'.$labeltype.'">';
+					print '<td class="tdoverflowmax100" title="'.dol_escape_htmltag($labeltype).'">';
 					print $actioncomm->getTypePicto();
 					print $labeltype;
 					print '</td>';
diff --git a/htdocs/theme/eldy/global.inc.php b/htdocs/theme/eldy/global.inc.php
index 6f246a0ce96..ce4c6760aab 100644
--- a/htdocs/theme/eldy/global.inc.php
+++ b/htdocs/theme/eldy/global.inc.php
@@ -1395,6 +1395,12 @@ select.flat.selectlimit {
 	overflow: hidden;
 	height: auto !important;
 }
+.tenlinesmax {
+	display: -webkit-box;
+	-webkit-box-orient: vertical;
+	-webkit-line-clamp: 10;
+	overflow: hidden;
+}
 
 .tablelistofcalendars {
 	margin-top: 25px !important;
diff --git a/htdocs/theme/md/style.css.php b/htdocs/theme/md/style.css.php
index 2324da32c43..71c45545961 100644
--- a/htdocs/theme/md/style.css.php
+++ b/htdocs/theme/md/style.css.php
@@ -1514,6 +1514,12 @@ select.flat.selectlimit {
 	overflow: hidden;
 	height: auto !important;
 }
+.tenlinesmax {
+	display: -webkit-box;
+	-webkit-box-orient: vertical;
+	-webkit-line-clamp: 10;
+	overflow: hidden;
+}
 
 .tablelistofcalendars {
 	margin-top: 25px !important;