No achievements (Steam or in game) since linking Factorio account with steam

[FlachFritz]

Since linking my newly created factorio.com account with my steam account I don't get achievements anymore, neither in Steam nor in the Factorio achievement list.

After linking my account I connected to my friend's game which we have been playing together for a few days, and my inventory content was gone. Supposedly due to the name change from my Steam name "Flach-Fritz" to the factorio.com account name "FlachFritz". As a quick fix we used the "/swap-players" command to get back my armor and stuff, which restored everything except my hotbar content.

So far so good, but a few play sessions later we noticed that I did not get any of the achievements that my friends got, since I did that link/swap thing. My friends on the same server continued to get achievements as before.

Changing my Steam profile name to the factorio.com account name did not help.

I'm a bit hesitant about unlinking because I'm not sure how many times I can link/unlink my steam account with my factorio acount in a given time, or if that would mess up things further.

PS: The play time on that savegame was about 6-8 hours when we did the swap. Now it is about 313 hours.