Changes already committed and pushed to a remote repository by another user appear as changes to me in GitHub Desktop

Three of us are working on a remote repository. Person 1 made some changes and committed them. To Person 1, they appear as committed and pushed. To Person 2 and Person 3, the changes appear as local unstaged changes on our local repositories. We have previously been committing and pushing without trouble, with GitHub Desktop displaying the same “Changes” and “History” across machines.

Any advice would be much appreciated.