Pretty simple explanation, the brushing mechanics on armadillos doesn't have any cooldown, meaning that you can pretty much able to spam to get the armadillo scutes nonstop.
MCPE-177549
Brushing armadillo for scutes doesn't have cooldown
Resolved
Works As Intended
2
Thank you for your report!
However, this issue has been closed as Working as Intended.
Remember not all differences between game versions/platforms of Minecraft are bugs. If you need help or have a suggestion you might like to visit the feedback site thread at https://aka.ms/MinecraftArmadilloFeedback
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