diff --git a/calendar/js/et2_widget_event.js b/calendar/js/et2_widget_event.js
index 48cb1a6896..de5b480edc 100644
--- a/calendar/js/et2_widget_event.js
+++ b/calendar/js/et2_widget_event.js
@@ -196,7 +196,8 @@ var et2_calendar_event = (function(){ "use strict"; return et2_valueWidget.exten
 	_UID_callback: function _UID_callback(event) {
 		// Copy to avoid changes, which may cause nm problems
 		var value = event === null ? null : jQuery.extend({},event);
-		var parent = this._parent;
+		let parent = this.getParent();
+		let parent_owner = parent.getDOMNode(parent).dataset['owner'] || parent.getParent().options.owner;
 
 		// Make sure id is a string, check values
 		if(value)
@@ -205,7 +206,7 @@ var et2_calendar_event = (function(){ "use strict"; return et2_valueWidget.exten
 		}
 
 		// Check for changing days in the grid view
-		if(!this._sameday_check(value) || !this._status_check(value, app.calendar.getState().status_filter, parent.options.owner))
+		if(!this._sameday_check(value) || !this._status_check(value, app.calendar.getState().status_filter, parent_owner))
 		{
 			// May need to update parent to remove out-of-view events
 			parent.removeChild(this);