Grove IR sensor vibration sensitivity

Does anyone know if the Grove IR sensor is sensitive to vibrations? I have a project where I mounted a Grove sensor onto a test device. When tested in a static setting the results line up with what we expect. However, when we test the system in a vibration (impact induced vibration) the results no longer agree with our expectations. The system is monitoring missile velocity and the sensor undergoes about a 2" drop caused by the missile impact.