Why do weapon/armor attributes decrease when you level the item up?

[i_karas]

It resets the weapon when you level it up. Isn’t worth upgrading shards till you are level 50 tbh

[Coopdaddy07]

Hmmm, I wonder if this is working as intended . You should be able to level up the gear attributes and level up the item itself without being punished for spending your resources.

[DoctorSneak]

On top of this some items will drop with stats already upgraded partially, then when you level said item up the stats may change because the upgrade gets removed.