I have had characters parked at 1370 and under for a while and they have been able to do boss rush with no issues up to this point. These characters are now locked out of opening the reward chests from doing boss rushes. I am curious if this was an intentional change or if this is an issue that is actively being looked at. It is a real bummer that all of these characters are locked out of the rewards for the content they are allowed, and have always been allowed, to do.
ye they made it like this from last maintenance “to combat bots” but either way the 5 il are dirt cheap you just have to go at it 
Hi @SilentTao
Hope you are doing well!
I’m sorry for the confusion about to been unable to open boss rush chest unless 1375.
As @bekabow mentioned this was intentional made in order to mitigate bot abuse and this change is temporary.
Here is the link of the post the team made about it with the weekly update:
Hope this information helps! 