I have the same problem.
Me too, until this time.
I have two Android devices running Flaming Durtles. The last time new vocabulary was added, the new items showed up for lessons and reviews on my newer Android device within a couple of hours after they appeared on my desktop PC. However, on my older Android device, the new items didn’t show up until about 24 hours later. They eventually did show up on both devices without a database reset.
Is there any reason for it to work differently this time?
[Edit: This time the new items showed up on my older Android device after about 14 hours, but my newer Android device continued to ignore them until I reset the database with helpful hints from @Kappa420 and @Pep95. I’m still curious to know why this happens.]
Urk, do I really have to do that? Won’t the new items appear eventually on all my devices if I just wait long enough, as it did last time?
(Goes back to the desktop PC to do my reviews for now.)