Missions not giving rewards

There’s been like 3-4 times now where I’ve done a skate challenge that has 5 diamonds and it’s not a timed challenge but some will take me a few minutes and I’ve noticed a few of them won’t show as complete on my map once I finally do finish it nor will I get the xp for it, it’s extremely frustrating spending more time than you want on an annoying challenge then only to not be awarded the xp or even have it show complete. Has anyone else had this problem?