Crash when enabling LockRows and dragging selected events from both splits

[matsbryntse]

http://lh/bryntum-suite/schedulerpro/examples/highlight-event-calendars/

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'assignmentRecord')
    at EventDrag.internalSnapToPosition (DragBase.js:143:41)
    at DragHelper.snapCoordinates (DragBase.js:236:20)
    at DragHelper.updateTranslateProxy (DragHelperTranslate.js:415:32)
    at DragHelper.startTranslateDrag (DragHelperTranslate.js:244:16)
    at DragHelper.internalMove (DragHelper.js:784:24)
    at DragHelper.onMouseMove (DragHelper.js:887:14)
    at HTMLDocument.handler (EventHelper.js:571:78)