Let's talk about arena 2v2 eternal chests

On my grind to 2v2 eternal I have gotten 3 eternal chests in the last 30 min. What’s up with that!? I also encountered a bug where it displays you getting an eternal chest at the end of a match, but upon opening your messages there is no eternal chest there. I’ve gotten this bug 2 times, so counting those 2 bugs I have gotten 5 eternal reward chests in half an hour of 2v2 combat. Anyone else notice something similar?