RNG is just a RNG. Though putting random and computer together isn't really all that random. Look it up, the actual name is pseudo-RNG, meaning it attempts to be random like but really isn't because a computer can't just pick a number out of thin air like we can rolling a 100 sided die. The only thing going against you is likely the time seed they usually use for RNGs. So don't blame the RNG, blame the time! (Unless SE doesn't use time to seed the RNG, then blame whatever they seed)