[Pard] [2.0.10] Rocket-launch achievements unlock before 50% joined time

[SuperTux88]

When you join a multiplayer game late, you won't get any achievements before you were online for at least 50% of the total game-time. However, I was a bit surprised that the 3 rocket-launch achievement (launch a rocket, and the 8h and 15h variants) unlocked on the first rocket-launch, even if I still wasn't joined for more than 50%. So are the rocket-achievements special and is it intentional that they don't require the 50%? Or is this a bug?

This is a new standalone installation, so it didn't have any achievements. In other installations I usually already have these achievements, so I wouldn't have noticed it and I therefore also don't know if this was already the case for 1.1.x.