Rotten Egg/Sulfur smell in hard seltzer?

Hi everyone. So my girlfriend got me a variety pack of Truly hard seltzers this weekend which I normally drink whenever I’m relaxing. However, these ones have been giving off a rotten egg/sulfur smell that I haven’t smelled in any other drinks I’ve had. It doesn’t taste bad or anything (maybe I shouldn’t have drank it?) Just smells odd. Is this problematic? Should I throw out the rest of the seltzers? Also, I’ve only smelled the smell from the citrus flavor and none of the other flavors.