Opera regression: Jump list items not restored

I did some testing with the Opera browser recently, and while doing that I noticed an interesting thing. The version I originally had - 25, maybe; it had the old non-perfectly-circular-O-with-a-shadow icon - would, upon its jump list tasks being deleted, restore them on the next run. The newest version of Opera does not do this. I couldn't find a way to bring the items back without doing a complete uninstall and reinstall of the program.