Hi,
I just realized achievements I did not do (except the ones from the High Life DLC) are unlocked on my account. They are all dated to September 7, 2021. Did anyone else experienced that? Is it a bug from the release of the High Life DLC? And most importantly, is it possible to lock these specific achievements again, so that I could unlock them myself?
Hey @ShonJannow, thanks for reaching out and welcome to forums! 
After having a closer look, I can see that this has been indeed brought up to our attention relatively recently, therefore our team will be reviewing this particular matter further.
At the moment, we do not have any further information, however as soon as we do, details will be posted here, in our official forums, so keep an eye and apologies about the inconvenience this may cause for the time being.
Should you have any questions or if you run into any other difficulties, let us know!
devtrackers.gg