How to remove labels from a renderer

Web vtk.js
6

Not sure if it’s due to creating lots of renderWindows since I am using a single fullScreenRenderWindow, and the error only occurs after calling the method which deletes my vtkLabelWidget’s for a third time. Still have not found the issue…

          document.getElementById('btnDel').addEventListener('click', () => {
            widgetManager.addWidget(labelWidget).reset()
            widgetManager.removeWidget(handle);
            svgCleanupCallbacks.get(handle);
            svgCleanupCallbacks.delete(handle);
            handleTextProps.delete(handle);
            handle = null;
})

Am I properly deleting the labels from the renderer? Or could it be related to something else?