This happened to me. On my phone and on my MacBook, I kept being asked to sign in. I was confused because I didn’t do anything that would require me to sign in

This happened to me. On my phone and on my MacBook, I kept being asked to sign in. I was confused because I didn’t do anything that would require me to sign in again. I assumed that it was some security thing since I had been signed in on both devices for many months. After a while, I decided to sign in on my MacBook and then that changed some setting with iMessage messages syncing between devices.