Sticker hunting Glitch

[Knytul]

Me and a guildie tested this. We dont know why it happens, but heres what our issue is:

Someone in another guild attacked me, and that individual has a piece of equipment i need sticker for. When i won the battle, i got that sticker. When I attacked a guildie and he won, i have a piece of equipment he needs sticker for. Yet he did not get that sticker. The concept behind the 2 attacks were exactly the same:

Person 1 attacks Person 2, Person 2 wins in defense. Sticker was obtained on first example, but wasnt obtained in the second.

[Leander]

Did you equip the item or did you just keep it in your bag?

[Knytul]

(Sticker not received) always equipped. like my shield for example. had it equipped. he attacked me and won, but didnt get the sticker.

(Sticker received) Someone else i dealt with, they had a necklace i wanted, so they unequipped and attacked me. i won.