Unfortunately for Yun Xi, the misunderstanding was already greater than it seemed, one that she can't back off.
"I didn't understand a word of what she said, it's as if she has been reduced to a normal creature. Her intelligence allowed me to communicate with her through my skill, but I can't do that with you anymore. Which means only one thing. Whether it's that she somehow reduced back to a normal animal, or it's that you aren't the same one as her." Seeing Jun Shang reach useless conclusions was even more frustrating than Yun Xi thought.
He was just a supporting character in a story, even if the main character's life line was directed and destined to reach a perfect conclusion, for side characters, it's an uncertain thing. Because their life and thoughts aren't mentioned in the story, they can easily deviate from the character the creator made them as.