So after not getting a reward this week and opening multiple tickets which didn’t really offer any help, my vault finally generated the reward for me, 4 days later, randomly, after I had already given up. Since some GMs suggested this was a matter of relogging I can only assume it took around 200+ relogs. If anyone with this issue is desperate enough, you might wanna give it a try, if you got nothing better to do. Hope this helps.
So there was a recent hotfix to an issue relating to the Vault, which is likely what resolved the issue in this case. If it is a display issue relating to login, doing it a few times would have fixed it. I’m glad it has now been resolved!