Talk:Achievements/@comment-1500935-20180124203250/@comment-1500935-20180128172756

I tried it after replaying the game up the lava zone. It's still not working for me. I'll report in on the official forum.

EDIT: I actually got following some advice on Steam's forums. Oddly, the trigger was below the plant (~1250m), a bit further into the large cavern from one of the nearby access tunnels.