I am a high mastery rank player that merged my psn account (main) and pc account. I want to get the steam achievements relating to mastery. I cannot achieve these achievements because I have already mastered all the items that count for the achievement.
Specifically, for one and not the only one: Shuriken Mastery I, Shuriken Mastery II and Shuriken Mastery III require mastering Boomerangs, Throwing Disks or Throwing Daggers. I have already mastered all the boomerangs, throwing disks or throwing daggers in warframe. The achievement needs me to master them for the first time, so using forma doesn't work. I have no guarantee that any new boomerangs, throwing disks or throwing daggers, even primes, will be added to the game within the next years. I cannot get this achievement on Steam.
I'm fairly sure that these sort of bugs are happening across platforms for other people. I am here submitting my case to add to the pile.