Weathered Copper Block has capital 'K'

When I first played the first 1.17 snapshot I was very excited. By the first look I didn't recognize this. Then I saw it: The "Weathered Copper Block" has a capital 'K' in its name. I thought:

"Maybe they fix it in the next snapshots."

But nothing happened. So I decided to make a bug report because this can't be a feature.