So this is still not fixed eh? Just a few days left and challenges not triggering, seems pointless to waste time now. Gave up yesterday when I did a custom race weekend to complete 6 VIP challenges in one go and add a stage to 3 others. Result? Only 2 challenges got completed, 4 did not trigger, the other 3 did not get bumped.
Don't really care all that much about liveries and other items, already got the ones that I'm interested in, but I do care about Pit Coin - THAT COST REAL MONEY. And apparently I won't be getting that last 2500 coin reward due to a bug.