Achievements not working

For some reason in the latest beta build of Minecraft bedrock 1.6, i am not able to get certain achievements. (A good example would be the body guard achievement.) And it has been this way since a good amount of betas. (Since the first second or third beta of the update aquatic i think.) If you could fix this i would be very happy. (P.S. I don't use a google pixel, i use an android tablet by the company NuVision, which is not listed in the devices section. Model number: TM800A740M.)