Evolving Shrine Buff Not Working

Dear GGG,

I have seen a rather common occurrence of the evolving shrine not working throughout the full buff deration in my maps. When I get the shrine's buff it seems like the first few packs of monsters I kill will evolve (monsters killed within 10 seconds or so of obtaining the buff) but after this point monsters stop evolving. I have killed multiple packs of magic monsters with the shrine buff active (but after the initial 10 second period) and not a single one evolves into a rare monster. The buff is supposed to grant a 25% chance to evolve the slain monster and I find it quite statistically improbable that when I kill in the order of hundreds of monsters of magic rarity, not one of them evolves into a rare monster. Thank you! Other than this I have been absolutely loving this league!!!

Yes wanted to report the same. Shrine does not work properly as described