Calamity mod hallowed bars not dropping from mecha bosses

[SweatyChildren56]

is this supposed to be like this ?

[Fluxxation]

Yes. In the new calamity update there has been an early hardmode modification. Upon breaking altars early hardmode, only cobalt or palladium will spawn. The first mech you beat will be slightly easier. After you beat that mech, you can orichicallium or mythril. After you beat the second mech, which will be about the same difficulty as normal, you can get titanium or adamantite. After you beat the last mech, which is slightly harder, you get hallowed ore, which is basically hallowed bars in ore form. Each of these needs to be spawned using altars after a mech had been defeated, so don’t waste all your altars. If you have certain mods, you can also craft the demon/crimson altars using brain or worm drops.