The issue occurs in the most recent version of Firefox, 159.0.1 (as well as some previous versions, although I don't know how far back it goes). I'm on Windows 10. The issue also occurs in the Android app version of Firefox (also version 159.0.1), on Android 17 (Pixel 9 pro, latest security update).
Even in Troubleshoot Mode, the publish date line still isn't listed.