Xbox
No screenshot available pop-up showing results of purchase gone before I realized the issue and could take a picture. You can see 5 Triton Guard Mera Shiny Tokens in inventory.
What you were expecting to happen, and what actually happened:
I purchased the Heroic Booster to get additional shiny keys. Instead of getting Heroic Booster rewards of 20 Journey Sigils, 4 shiny keys, and potion of heroism, I received the Headstart token, sigils for next weeks event, and 5 shiny tokens for Triton Guard Mera as well as other headstart rewards.
How often does this happen? When did it begin happening?
This is the first time I bought something and got something else. Happened about 15 minutes ago.
Steps to make it happen again
I assume purchasing a second time may do the same thing, but not willing to make that purchase to try.