File missing from individual commit view

Summary
When I open an individual commit, at least one file is missing from the file tree. I do not know how prevalent this is, I just happened to be able to easily identify one occurrence, so I am passing that on for your consideration.

My repo is public so I can show you a good example. That screen shot is from this commit: [`bf2c603` (#4226)](https://github.com/chef/automate/pull/4226/commits/bf2c603bf51fc6bdf813737a5dfe98bcb2e842c6)

I know that at least one more file is in this commit, components/automate-ui/src/app/pages/create-notification-modal/create-notification-modal.component.ts, because VSCode shows the changes from that specific commit:

One possible factor that may or may not be relevant: the file in question was added earlier in the commit history of this PR; that is, the PR was not just updating an existing file.