[P5V9] Rozemyne uses sound blockers (spoilers)

In P5V9, Rozemyne participated in the battle against the former Gibbe Gerlach. She was traumatized by how feistiness were used, an act in which people must have been killed. During the post-battle feast at Eheenfest castle Sylvester brought out Georgina’s drystone and Rozemyne is so traumatized. She was having a mini panic attack.

Later on, it was confirmed that she developed a dear for feystones. At least the act of seeing and youching one. To the point where she wasn’t able to even touch her orzonnanz feystone.

During the night when she was unable to sleep, she invites Hannelore to tea in the greenhouse and hands her a sound blocker. Sound lockers are magic tools which are made from feystones. Was this a plot hole? Clearly Rozemyne wasn’t panicking when she touches it.