We want to clarify that the reward you received for reaching the 45th streak only replicates the effects of leveling up, such as the growth of crops and trees, and a fill-up of resources. However, it doesn't actually increase your player's level. As soon as you claim the reward, you'll see the effects take place.
We apologize for any confusion or inconvenience this may have caused you. We'll make sure to improve our messaging in future updates.
Thank you for your patience and understanding!