Kai Syaoran saw the effect he had on the world and this was when he knew that he had gone too far. He needed to attract some prestige to himself to become the Martial Deity of the Sea Martial Sect but what he was now doing was far beyond necessary. By doing this, he basically announced his talent to the world. This was a hazardous thing and if someone were to somehow discover his true identity, he would be in real trouble.
Even in his true form, he was sure that he was not powerful enough to face powerful figures such as Governor Yun Che.
For this reason, Kai Syaoran decided to begin actively restricting the phenomena.
The only silver lining was that this phenomenon gave him the perfect cover to break through into the Spear Emperor Realm without attracting attention to the lack of lightning tribulation. Since this was the case, he immediately began his breakthrough.