Get null on all?

[xorgxx]

Hi i try to get :

    use SunCat\MobileDetectBundle\DeviceDetector\MobileDetector;
....
        /**
         * TerminalProcessor constructor.
         *
         * @param SessionInterface $session
         * @param MobileDetector   $detector
         */
        public function __construct(SessionInterface $session, MobileDetector $detector)
        {
            $this->session = $session;
            $this->detector = $detector;
        }
....

            $terminal = $this->detector->isMobile();    <---- i have in any cas [true] plus it's not possible to get isAndroid() or isIOS() 

i use SF 3.3.16, "suncat/mobile-detect-bundle": "^1.0", php 5.6

Thank for help.