Euler should be converted to quaternion not the other way around

[doglet23]

/worker.js line 118

else if (value instanceof Quaternion) {
    value.toEuler(state.tempVector)
    value = state.tempVector.toArray()
}

/worker.js line 195

case 'setQuaternion':
    state.bodies[uuid].quaternion.setFromEuler(props[0], props[1], props[2])
    break

Why is quaternion being converted to euler just to be converted back to a quaternion again when that causes loss of data? It should be the other way around. Eulers should be converted to quaternions since there's no loss of data.
This is pretty annoying because i've set up cannon-es on a server and im broadcasting the quaternion of a body to the client and this conversion is most likely causing the client body to rotate unpredictably.

[doglet23]

Just for reference here's what my code looks like:

server:

ws.send({
        pos: body.position.clone(),
        quat: body.quaternion.clone()
}),

client:

playerApi.position.set(msg.pos.x, msg.pos.y, msg.pos.z)
playerApi.rotation.copy(new Quaternion(msg.quat.x, msg.quat.y, msg.quat.z, msg.quat.w));