Was this in survival, gear does not work the same there.

Sometimes lag happens, if your main did his standard attack before his afterwards then this was the case here.

Also i notice sometimes game tries to speed up fights by playing animations at same time, 2-3 attacks at same time, i had my Kibas pet attack before my main healed, but i am sure on server they did it in right order, just them rushing animations messed it up.