Have you tried the latest experimental? Curious if the fix for https://forums.factorio.com/viewtopic.php?f=11&t=121934 had any effect, or if more achievement triggers need to be manually fixed. Latest experimental (2.0.22) does not appear to resolve the issue for me. Though I only tested flying...

I'm curious if this is intended or just an oversight.

I played my first Space Age playthrough on a multiplayer server with friends from various countries and due to time-zones most of us ended up not having the 50% of total world playtime required for achievements by the time we go to the edge of the solar system. No biggie, I thought, the achievement ...