A bug could cause a Hero challenge to be recorded under a different difficulty than the one actually played. Today's update fixes this.
Because of this, Hero Numbers for Hero Series Act 2 (Shiva / Fenrir) can no longer be told apart from legitimate ones. We have therefore cleared all Act 2 Hero Numbers.
No.0001 is open again.
We're sorry to those who already held a number. We had no way to tell legitimate numbers apart from the rest, so rather than remove only some of them, we chose to start over with a clean slate.
The "alchemize weak non-party tasmon" button in the Craft window could sell your Hero partner. A partner recruited on Normal is Rare tier, which put it inside that filter.
After today's update, bulk alchemy excludes:
Selling tasmon one at a time works exactly as before.
If you already lost your partner this way, it returns automatically the next time you launch the game after updating. You don't need to do anything.
To apologise for the trouble, we're sending everyone 1 Astral Coin and 1 Divine Coin. You can claim them from the ✉ mail in game.
Hero Numbers can only be issued to an updated game. On an older version the number stays "pending" (the game itself plays normally).
Your partner coming back and your Hero Number being re-issued both happen automatically on launch after the update. Please update before claiming the gift too.
Steam updates automatically when you launch it.
Thank you to everyone who reported these.