Invinicible due to Plutonium Poisining???

So... after having an inventory full of Plutonium (mined by my Builder and Proccesed with create) i was putting it all in my refined Storage...

Suddenly i got Damage that should have killed my.. though i have a totem.

After that i was unable to be damed by anything (effects, void, /kill)

(i had a scoreboard active which shoed the Health in the player list... that dissapprered for me..)

my buddy tested it too and took a full inv of Plutonium.. .. when he put it back he also popped a totem.. and was immortal.

I checked the Greg tech effects, we both had Carcinogenic.. but even after clearing it we where still imortal