Aaaaaaand, of course:

But I guess that's fine, RNG is certainly working as intended, the numberous times that "almost impossible thing" (= last/50) occurs is just bad luck, right?

More seriously, if I am not wrong, the probaility should be:
Probability = (1-1/50)(1-1/49)...(1-1/2)
And yet that's rather frequent.