1. I have the stacked items
   https://gyazo.com/a392c0b70236f59ecb1e34141c5da5ae
2. I drop the stacked items:
   https://gyazo.com/48d2123b45c7482b36d23d96087d768e
3. I pick up the stacked items:
   https://gyazo.com/fce25af6ee67640fed9f033f21504dda

It doesn't pick them up back to 64 ):

This is a great suggestion!

Armor is not meant to be stacked.

This is vanilla Minecraft behavior, not Essentials.

dvargas, this is meant to happen. Nothing's wrong here.

then could you please make it compatible or make it work? Or either a fix? I really like your plugin

...why?

so players can pick up the complete stack of the item

This is the expected behaviour.

I'm pretty sure this isn't going to be changed as it's vanilla behaviour.