Pei Qian had already more or less confirmed that Tang Yishu's halo effect had not produced bugs in perfect games out of nothing. Although there seemed to be metaphysics involved and she had a special halo effect that could spread bad luck to her surroundings, such metaphysics still had limits.
For example, there would be greater chances of an unlikely event—such as stepping on one's own shoelaces and tripping—happening if one was standing next to Tang Yishu.
However, if one was not wearing shoes with shoelaces, such a thing would not be possible.
In other words, Tang Yishu's halo effect was only a magnifier that would greatly increase the chances of unlucky events happening.
It was the same with the bugs in the game.