Yeah, same. Lost my boss key this morning.

Lost Keys, lost energy.. as most people. Hardly worth a post.

We have fixed the error, the game is stable now. We will discuss the compensation tomorrow. Thank you all for your patience here.

Lost reward also bought some energy just before maintenence message came out. What a waste. Wish I had seen this post so I didnt have to waste time. Ty for fix tho

Hello everyone! The promised compensation has already been delivered to your accounts: 500 Energy; 4 CB Keys; 4-star Chicken; 3-day XP booster. NB! Only the players that were in the game during the three hours the error in battles was popping up (from 12.00 PM through 3.00 PM UTC) have received it. The given items will expire in 72 hours. Make sure that you claim them before they are gone. And thank you for being with us!

Cirilla said:

Hello everyone! The promised compensation has already been delivered to your accounts: 500 Energy; 4 CB Keys; 4-star Chicken; 3-day XP booster. NB! Only the players that were in the game during the three hours the error in battles was popping up (from 12.00 PM through 3.00 PM UTC) have received it. The given items will expire in 72 hours. Make sure that you claim them before they are gone. And thank you for being with us!

Thanks for this generous compensation. Might I ask for future CB keys to be sent to the giftbox as well?

Just imagine your next key is up in 1 minute and you are eagerly waiting for it to be ready so you can go another round - then the compensation hits.
Sure, you could argue that you save a minute, but then again you could also argue that you just lost 5h 59minutes, since the key from regeneration won't come. Since the next CB key from regeneration is now X CB runs away, you'll probably have to wait for a total of 12h 30min just for 1 key from regeneration...