Using the Kaleidescope Parasol's large canvas to hide Stolord's movements was a trick that Ye Xiu liked to use. There was no way Team Samsara wouldn't know about it.
Knowing about it and playing against it were two entirely different matters. When Stolord held up his parasol in front of him and used Charge, Zhou Zekai had recognized this possibility. He had observed that Stolord should still be behind his parasol. After all, his parasol was mid-Charge!
Yes, the Kaleidescope Parasol was still mid-Charge!
But when Cloud Piercer moved horizontally so that he could attack Stolord unobstructed, Stolord was gone.
Zhou Zekai was confused for a moment, but he quickly figured out what had happened.
Spirit Guidance!
This was the Exorcist's Spirit Guidance. Ye Xiu used this skill and threw out his parasol to make it seem like he had used Charge.