You can not take wool out of the sheep !!! (Cannot Shear Sheep + Others With Used Shears)

Hello Mojang
Well, I'm here to report a bug that we have in version 0.17.0 / 1.0 of minecraft pocket edition, it turns out that there is no longer the option to take the wool off the sheep and I would be grateful if they could fix this error.
Thank you!

^{Addition by [Mojang] Mega_Spud (Jay Wells)}
You cannot use shears that have anything less than 100% durability, meaning you can only use them once.
This affects:

• Shearing Sheep
• Removing a Snow Golem's Pumpkin Head
• Shearing a Mooshroom

(Updated Title)