I've had this issue with the March of the Machines Mastery. I bought the Mastery Pass, but I noticed I wasn't getting the Mythic card rewards. I double-checked collection to see if it just didn't display but it wasn't there, and I didn't receive a wildcard either. Several levels this Mastery with Mythic ICR, so definitely missing out on a lot of promised (and paid-for) rewards. Log is from Level 62 completion.
Fireshrieker#04471
I've had this issue with the March of the Machines Mastery. I bought the Mastery Pass, but I noticed I wasn't getting the Mythic card rewards. I double-checked collection to see if it just didn't display but it wasn't there, and I didn't receive a wildcard either. Several levels this Mastery with Mythic ICR, so definitely missing out on a lot of promised (and paid-for) rewards. Log is from Level 62 completion.