Not sure if I’m onto something or not, but the Retort plugin seems to set the z-index of the div.topic-body to 3 in retort.scss.
If I use dev tools so that the style is not applied to .topic-post .topic-body, then the date panel behaves as I’d expect.
As I’d mentioned above, I’d already disabled Retorts (due to an error that I’m going to report on a separate thread) but the CSS is obviously still active.
I will try to remove the Retort plugin and rebuild to see if the behaviour is still there.
CC: @gdpelican.