Ramp's charge not giving magic immune at 4+ charges?

[SEnergy]

in buff tooltip it says you will become magic immune at 4+ charges, well, I was charging ws and he stunned me when I had 6 charges, same thing happened about 4 times against ws/pyro

[ElementUser]

I tested it and it's working fine. You must have entered the 450 range in "warp-speed mode".