There has been a game crashing bug since release. The game freezes just before the end game cut-scene (Apparently, there is a problem with a file and prevents it from loading). Since you cannot reach the post-game screen, you are not given any rewards. A simple solution is to give the player his/her rewards at the victory/defeat screen.That way, people would be less frustrated and relived that they are no longer being robbed out of their efforts. I have seen threads about this on reddit/forums and messages to ubisoft on social media platforms. I have no doubt in my mind that they know about this issue. But it seems they are not working on an actual fix nor have the publicly addressed the problem yet.
Lastly, if you have not experienced this issue yet, then kudos to you. But that does not mean the issue just vanishes.