Xyclucian, the Chimera has a stragne hit box when using perfect strike

When using the skill Perfect Strike on the boss Xyclucian, the Chimera, the hitbox appears to behave abnormally. Attacks often miss even when clearly aimed at the boss. i have died countless times in trials of chaos because of this. as im using it for main damage for bosses itc a pain in the ass to have it hit my mark 1/6 times . and itc not a problem about standing too far or missing the perfect strike window. i ony have this problem on the cimera.