Agree with this. Same issues for me on 2022.8.2.My guess is that your third row issues are all related to the software woes. I’ve noticed that when I get that stupid warning about the right rear safety restraint system, the motor in the middle seat stops functioning. Then, if it’s pushed back as far as it goes, the third row seat won’t fold down because the second row seat needs to “automatically” move forward an inch out two to get out of the way.
Whatever method you use to turn off that warning (seems like random luck after starting to me), the middle seat works again and so does the third row.