Hi All, Weird question that hopefully someone knows about. Have a 2018 5-seat Model X. Installed a forward facing child seat using the latch system and snapped the anchor on the hook behind the seat. Everything seemed fine until tonight. I noticed that the car started beeping intermittently. I could see that it detected that someone was not strapped in the back. It seems that the car expects that if there is weight detected, that the normal seatbelt should be used. I double checked the manual and it said to use the seatbelt for the child seat (instead of the latch system) if the weight of the child + the seat is over 65 lbs. This is not the case for my child. Anyone else experience this? Bad sensor?