Bug in the fragments

Okay, I'll be very direct. I was in the draft voucher spinning tab trying to get 17,225 fragments because I wanted to buy a new defender in that tab, but I already had 15,225. Then I spun the draft voucher using gems, and when I went to sell the players I got my fragments from, instead of increasing, they suddenly decreased. I was close to getting the right amount, and the game goes and does this, it went from 15,000 to 13,000. Now I'll have to farm, and it will take a long time because I'm not one of those rich pay-to-win players.