Phone key and Watch key suddenly don't work without fob

I set up my phone key 6 months ago and everything was working fine. 2 days ago, I noticed that the phone and watch keys don't work anymore for proximity unlock and also to start the car. I need the fob to get either of them to work.

I guess I can delete the key from the car settings and re-setup but before I do that, a couple questions:

1. Is there an explanation for this issue? (fwiw, I had left the car in the garage for about 5 days without using it)

2. I have shared the key from my iPhone wallet ... will those automatically get disabled or will I need to ask those folks to delete and then I have to re-share with them?