It may well be the lower seat trim. Mine is coming off and the mobile service guy stated that it's not uncommon for that to happen. If the trim is somehow loose or not fully seated, it can prevent the chair from fully tilting forward.
In my case, the second row driver's side (the 60% seat), does not re-latch. And it doesn't tilt all the way forward to allow entry into the 3rd row either. So there's a warning on my screen and a chime that constantly bongs. The mobile service guy could not find the cause. I'm going into Tesla service tomorrow to have it looked it, but if it's a bad motor, they won't have it for some time as it's not a stocked item. So now I have a car that's pretty useless to me, since it's not safe to transport my kids without the rear seat locked down.