Originally Posted by joxer
You're right, it's possible it's not a bug at all and probably it got stuck when I spent first crystal. But as I've said above, it's not something I'll regret, the bonus is pretty low.

Just checked I'm 25 hours.

For whatever reason crystal gathering got unstuck when I went exploring pirates' islands and I was able to grab both +1 Int rewards (not that it matters much…).
I can now only assume it wasn't a bug at all but as previously Yme posted, translating omission somewhere.