Today, I used a diamond to unlock the geometric triptych for the Glacio gateway engine but neither the Steam achievement nor the in-game suit unlocked. I tried restarting the game but that also didn't help. I have three gateways unlocked on the planet and had been traveling back and forth between them just fine. The interior gateway also is operating fine, in terms of its teleporting function. There is just no achievement or suit that is unlocking.