I don't know since when the next "observation" was implemented, maybe with last patch yesterday.
When upgrading monster cards to star levels there are achievements related to this.
For example enhance star level to 1 for x cards.
This achievement is for every zone, but also for continent and world.
As for the counter for continent (Candara) and world, it is actually not updating for me, as you can see in the video below.
I upgrade a monster card from Elven Island via stone to one, the card gets upgraded, but the counter for Cintinent (and also for world) does not update.
I did not check for zone counter, as i already surpass the achievement for star level 1.
This is critical to monster cards, as this counter needs to be maximized, before i can proceed with lvl 2 upgrades, as stated by you in a previous post.
Now this all comes to a halt.
Can you please check ?
I just tried another zone and in the other zone the counter is working.
So maybe it is just related to Elven Island ?
I will try different zones again.
I tried Howling mountains, there again, the Continent counter does not update.
I remember Karge Höhlen, also not updating.
I think I found the "reason", or at least can reproduce both behaviours.
My guess is, that, once the counter in the specific zone has reached 5/5 and it "jumps" to the next level (in zone need to upgrade 4 cards to lvevl 2 stardom), the overall counter / world / continent, stop counting the upgrades.
I tried in Silverspring, as shown in the next video, it does not count, as i have progressed in the zone specific achievement.
However in Ystra, i have not jet progressed, and there the upgrade count towards the overall counter.