It certainly looks like something is wrong with the Bounty system,
I have completed this "Score first" bounty, which was supposed to award me with +2 Rivals Points. I scored first, even won the match, but after the match, it showed that I failed the bounty. (I scored first for sure).
But furthermore, the very next match, where I had no Bounty active, after the match, it showed that I completed the bounty for the previous match and that I was awarded those +2 Rival Poinst. But guess what, when I went to check it in the Rival points overview, they were not counted.
And it is not the first time it happened to me also.. It is a shame, I think Bounties are a great addition!