Can't get the upgrade after all boss kills

So as titel says, i don’t know if this is a bug or im not suppose to get upgrades from all the bosses but i kill the last 2 bosses to day. i first kill Falstead Darak in the 2 face boss fight he has, then i forgot all about the upgrade so i went in to kill The RIven Twins, and tough to my self that i ofc had forgot to upgrade the weapons and gear tabs so i could carry more then 1 weapon. so i upgrade and thought i had 2 upgrades, but it only gave me 1 upgrade. so i can’t progrsess in the story becouse i have forgot to upgrade each time i have kill a boss. that needs to get fix, and also let us who might have forgot about this get our upgrade from the missing boss kill.