I disassembled 120 parts of Kar98k Kreigsmodell, then I started to upgrade it, just like what I did many times before.
As usual, I clicked the most left button. I suddenly realized it is not the regular upgrade button, it is the order button. However, it is too late.
So I finally waste a weapon upgrade order getting a 1 star Kar98k Kreigsmodell. I am very frustrated about it.
I believe I am not the last victim. Hope they can change that UI asap.