Same issue here. I reached my next level with horns from Events, but when I went to collect it said “No rewards to collect”
When I close the app and reopen the horns have vanished. I honestly could not tell you how many I had before. It seems like ‘maybe’ the event horns are not working correctly.
I’ve been testing this on both my accounts, but so far have been unable to reproduce the error you are seeing.
But thank you for the included screenshots, I have included this in my report to the team.
Are we only noticing this once we have just levelled up the Battle Pass level? Or are you experiencing it generally?
Once the notification pops up that the battle pass is to be collected is when it will happen. I was able to collect the reward today though. I will post if it happens again