Password required instead of Touch ID to unlock MacBook Pro
I rarely have a problem using Touch ID to unlock my MacBook. I walk away from it, it locks on its own based on my settings or I lock it myself and when I come back I use Touch ID to unlock it with all the applications and internet browser windows where I left them. However, from time to time it will say that I need to enter my password to unlock it. In these instances it's as if I restarted my MacBook and everything I was working on is closed.
It happened to me just before I asked this question. I stepped away for about 15 minutes, when I came back, I needed to enter my password, all the pages I was working on, gone.
Why does this happen and how can I prevent it? I'm on a 2018 MacBook Pro, Processor 2.6 GHz Intel i7, running Big Sur v11.1