The impossible event challenges

I’m reporting an issue that the developer just buff and nerf some plants and zombies and gives the in PvZ heroes which made challenges impossible now just 4 day ago because disco naut zombie had a nerf in his passive ability which got down from 3 to 2 it has made the challenge impossible and today challenge briar rose which has 4 strength and 5 health use to have 3 strength and 4 health it’s has gained a buff and today’s challenge is also impossible as u can see in attachment  1 but it is possible in attachment 2 cuz the planet haven’t been buffed . So my request is that pls look what u guys have buff and nerf  and how the challenge was bested  before and is it possible now if not due to change then pls put another challenge except them