Can’t make weapon build??

Whenever I try to make a new weapon build (Zombies or Multiplayer) it doesn’t save a new one. If I want to use a weapon with certain attachments, I have to remember what I had on it before. Is this just me? Does this happen to anyone else,l and is there a way to fix it? I also want to know if I’m not the only one who has this issue, cause I’m afraid it wont ever be fixed

(This was happening before season 1. And I was able to make weapon builds before, but the feature just stopped working all of the sudden.)