I think people are referring to two different things.
Some folks want to detect a possible anomaly in the whole implementation (be it rng quality, coding error in the implementation, wrong logic etc...). Well fine, why not, good luck though.
Another person tells you that what you see as patterns is not relevant. I think (s)he is right because this is not the first time that with an affine/linear congruational generator (likely used here, not certain though) you'll see "patterns" at low numbers and no such things at higher numbers of test. I don't think (s)he wants to discourage you from showing that the distribution is not uniform and thus suspecting a problem in the game.
TL;DR: elementary statistics won't help you to prove the quality of the RNG itself - how Larian uses this generator is another matter.