Mourning moodlet not showing up when a sim dies/Sims cannot be consoled

When my Sims dad died recently (who they had an excellent relationship with), they got no mourning moodlet. Also when I went to visit the household as my main sim, their mother who was still alive could not be consoled about the death. There was also no urn at the property. It was like he hadn't died, even though I'd got a notification about it, and he definitely had died.

no mods are being used in game, playing on PC.