I thought I fixed that, which version did you play?
Damn, I'm honestly not sure. The thing is that I played the game yesterday, but I had already downloaded the game some days ago, so I really don't know.
But the bug was present in both of my playthroughs, and I could have taken the key at any moment. The only difference is that I didn't take the key in my second attempt, because I already knew that it would lead me to a dead end.