Cresting Behemoth - Lightning beam attack persist

Console Bug Report Ref # 4036854169

During the Trial of Chaos (where I noticed it) the Cresting Behemoth monster type upon dying to thorns damage mid lightning beam attack causes the attack to visually disappear as though it’s gone away when the monster has died. However, the beam, while invisible, still proceeds to function and contribute to multiple hits as if the monster was actively using it.

Unsure if there is a time duration but it lasts for sure for more than 1 minute. Also unsure on if this is a Thorns specific trigger to the behemoth’s death.