* Fix bug #18848.

module/execution/js/taskkanban.js

@@ -1131,3 +1131,9 @@ function calcColHeight(col, lane, colCards, colHeight, kanban)
     if (typeof displayCards !== 'number' || displayCards < 2) displayCards = 2;
     return (displayCards * (options.cardHeight + options.cardSpace) + options.cardSpace);
 }
+
+/* Hide contextmenu when page scroll */
+$('.panel-body').scroll(function()
+{
+	$.zui.ContextMenu.hide();
+});

module/kanban/css/view.css

@@ -22,7 +22,7 @@
 .region .kanban-header-sub-cols .kanban-header-col > .title {max-width: 100% !important;min-width:240px;}
 .region .sort .region-header {cursor: move;}
 
-.region .kanban {padding: 0px 10px 10px 10px; min-height: unset; overflow: auto}
+.region .kanban {padding: 0px 10px 10px 10px; min-height: unset;}
 .region .kanban .form-actions {margin: 0;}
 .region .kanban .form-actions .btn {margin-right: 10px; min-width: 50px;}