Win Bonus not applied!

[Teodor Stoyanov]

Hello , I have the following problem :
Before the match I always set the winning bonus for players to the max , but very often after the match i see in the results that the bonus is not given and in lets say 80-90% of times my players perform very poorly if this is the case. Like my last game my team had an average of 14 stars more than the other team, the opponent had an illegal formation , yet i ended 3:3 and i managed to equalize at last 10 min . So my questing is this a bug and how can i prevent it from happening.
Thanks in advance!