Actual:

1. Perform a commit. (I'm using a git repository.)
2. The "File Status" view then shows "Nothing to commit".
3. In order to get back to the previous view, I click on the current branch in the list of branches. (See workaround below, I now now there's a better way!)
4. The following can be observed happening quickly:
   1. It shows the Log / History tab with the most recent commit selected
      with its details visible below.
   2. An overlay appears stating it's Loading 300 commits to reach a particular (seemingly random) commit.
   3. The load finishes then:
      1. The list of commits shows nothing selected.
      2. The commit details area is blank (grey).
5. Then, whenever I select a commit from the history it shows "Displaying all changes between" message, showing another commit is also selected.
6. Whenever I click a different commit, the visible selection changes, but there is still a hidden commit selected.
7. I then CTRL-Click on my visible commit to unselect it and now see the preview of the mystery commit from months ago.

Expected

I don't expect anything to become automatically selected.

Workaround:

In documenting this, I've realized I should just click the "Log / History" tab after committing.

Still, it is an odd behaviour that kept catching me out because of my strange navigation habits. This quirk is a recent new behaviour.