@@ -383,6 +383,8 @@ function isRangeInsideSingleMarker( editor, range ) {
//
// Note: This marker fixer only consider case which is possible to create using StandardEditing mode plugin.
// Markers created by developer in the data might break in many other ways.
+//
+// See #6003.
function ensureNewMarkerIsFlat( editor ) {
const model = editor.model;