Maestry Weapons (Lv 50) can´t be edited

Hi all,

So... I do not know if anyone else has got this issue or its a bug that I´ve got or im doing something wrong (thing I doubt).

But I can´t seem to edit any Level 50 weapon.

Not my M4A1 or Kord.

I mean I can edit it in the lobby for example but once I hop In a game the whole mastery weapon resets to its default value and maybe something like the grip stays but nothing else