I'd get a GIF but there's some problem with ShareX/ffmpeg right now, so until that gets resolved hopefully I can describe it adequately.
I'm going through fixing Sort Composer values, so naturally a lot of the thumbnail browser entries are changing. When an entry changes, the next entry in the list is selected, but the tracks from the previous selection are still shown in the main panel. If I click on the selected entry, it doesn't change. I have to select a different item and then go back the one that was selected when the original entry changed.
For instance, if this is the thumbnail browser:
Giovanni Gabrieli
George Winston
Carlo Gesualdo
And I fix George Winston to sort under "Winston, George", then Carlo Gesualdo will be selected as soon as I save the George Winston files. But George Winston will still be in the main panel, and I would have to select Gabrieli (or some other item in the list) and then click back to Gesualdo in order for Gesualdo to appear in the main panel.