Just FYI, I had the same issue and saw this post. I figured I would do some troubleshooting before I posted a "me too". I had to reset my advertising ID (Settings - Privacy - Ads) and this resolved the issue. Google Pixel 4 - Android 12.
Well, @evilgordo, it seems that I am just a fool who somehow convinced myself that the timer was an expiration. How did I play this long and not realize that the timer was just a reminder of the event length? I have no idea but thanks for setting me straight. I suppose if there is a bug it would...
As you may know, this week's element prize fight is "A Shining Example". The relics are time limited (totally fine and expected behavior). Due to time constraints I had not played the prize fight and had no Shining Relics; however, I did hit Level 70 (yay me!) and was issued one relic of each...