diff --git a/CHANGES.md b/CHANGES.md
index 86c9902e42f..aa7beb6a684 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -26,6 +26,7 @@ Fixed Issues:
 * [#12402](http://dev.ckeditor.com/ticket/12402): Fixed: Workaround for Blink's bug with `document.title` which breaks updating title in the full HTML mode.
 * [#12338](http://dev.ckeditor.com/ticket/12338): Fixed: CKEditor package contains unoptimised images.
 * [#12324](http://dev.ckeditor.com/ticket/12324): [IE8] Fixed: Undo steps not recorded when changing caret position by clicking below body.
+* [#12332](http://dev.ckeditor.com/ticket/12332): Fixed: Lowered DOM events listeners' priorities in Undo Manager in order to avoid ambiguity.
 
 ## CKEditor 4.4.4
 
diff --git a/plugins/undo/plugin.js b/plugins/undo/plugin.js
index 3fdfaf94aa6..f5b3e185e03 100644
--- a/plugins/undo/plugin.js
+++ b/plugins/undo/plugin.js
@@ -1055,18 +1055,18 @@
 				if ( UndoManager.ieFunctionalKeysBug( evt.data.getKey() ) ) {
 					that.onInput();
 				}
-			} );
+			}, null, null, 999 );
 
 			// Only IE can't use input event, because it's not fired in contenteditable.
-			editable.attachListener( editable, CKEDITOR.env.ie ? 'keypress' : 'input', that.onInput, that );
+			editable.attachListener( editable, ( CKEDITOR.env.ie ? 'keypress' : 'input' ), that.onInput, that, null, 999 );
 
 			// Keyup executes main snapshot logic.
-			editable.attachListener( editable, 'keyup', that.onKeyup, that );
+			editable.attachListener( editable, 'keyup', that.onKeyup, that, null, 999 );
 
 			// On paste and drop we need to ignore input event.
 			// It would result with calling undoManager.type() on any following key.
-			editable.attachListener( editable, 'paste', that.ignoreInputEventListener, that );
-			editable.attachListener( editable, 'drop', that.ignoreInputEventListener, that );
+			editable.attachListener( editable, 'paste', that.ignoreInputEventListener, that, null, 999 );
+			editable.attachListener( editable, 'drop', that.ignoreInputEventListener, that, null, 999 );
 
 			// Click should create a snapshot if needed, but shouldn't cause change event.
 			// Don't pass onNavigationKey directly as a listener because it accepts one argument which
@@ -1074,14 +1074,14 @@
 			// #12324 comment:4
 			editable.attachListener( editable.isInline() ? editable : editor.document.getDocumentElement(), 'click', function() {
 				that.onNavigationKey();
-			} );
+			}, null, null, 999 );
 
 			// When pressing `Tab` key while editable is focused, `keyup` event is not fired.
 			// Which means that record for `tab` key stays in key events stack.
 			// We assume that when editor is blurred `tab` key is already up.
 			editable.attachListener( this.undoManager.editor, 'blur', function() {
 				that.keyEventsStack.remove( 9 /*Tab*/ );
-			} );
+			}, null, null, 999 );
 		}
 	};