I have an online map that I add to a JavaScript/HTML application. The map has several layers in it set for server-side dynamic labeling. After the map is loaded, an index layer used for map navigation is added (end user clicks on a table entry to have the map zoom or pan to the selected feature). The index layer, since it is added separately, is labeled client-side using the LabelLayer interface. The labels work fine online; but not within the context of the app.
This issue was resolved with the release of v. 3.11.