After saving drawn objects with unique tag names, the saved Drawing objects revert to generic names after platform is restarted, thus invalidating alerts and other logic based on drawn objects.
It sounds like you are saving your workspace yes? Are the drawing objects added manually or programmatically? I can’t test this directly as I’ve reverted to 8.1.5.2 due to other problems with the new version. In 8.1.5.2 only manually drawn objects are saved to the workspace xml file, and they preserve the name in the <Tag> element. Are you seeing this element in your workspace file?
It really does seem like they didn’t do much (if any) QA on these new releases. Hopefully they get 8.1.6.2 out sooner rather than later.