Using on 2 devices but not sharing One Drive backup

I am using Scrivener for Windows on my PC and laptop. I back up to One Drive, and have both computers set to the same One Drive back up location. Until recently, this worked fine and no matter which computer I was using I was able to back up and open files.

Recently I have been doing most of my work on the laptop and when I close and reopen Scrivener all of my work is there. However, now when I open Scrivener on the PC the recent work doesn’t appear.

I have checked my file back up locations and they are the same on both computers. I don’t think I have changed any other settings, not deliberately anyway. I am reluctant to fiddle too much in case I lose everything.

I am using Windows 7 on both computers.
Thanks in advance for your help.