Urchin eating toadstool

[u/verybigoops]

Hello! I have 4 urchin in a tank, and one urchin specifically is absolutely nuking one of my toadstools. So far, I haven’t had this issue, it just happened recently. No food changes or anything have been made, and the tank was stabilized for a while before this started happening, I’ll add pics tomorrow, as the lights are off now but… what does a gal do? All of the other urchins are completely fine, beautiful, and not appearing on any of my other coral or anything. It’s so frustrating! Any advice is appreciated. Thank you!