Right now, discern isn't showing me durations whereas it used to do so.

I can think of two possibilities:

1. Discern was changed as of the last reboot.
2. When magic is at its weakest, discern doesn't work well. This seems like it's opposite of how it should be, if indeed discern is affected by the strength of magic. I've been testing this when spellbane gave me -34 save vs spell at hero, which is the weakest I've seen magic.