Has anybody had a sim with the "long lived" achievement die of old age?

I know this is a rather old thread, but my elder sim (didn't even complete the bodybuilder aspiration, she's just active and has lvl 10 fitness & wellness skill) has had the glowing bar forever, and now it's stopped showing how many days she's lived when I hover over it (I have another elder who I can still see, so it's weird that I can't for her). Has this happened to anyone else? I just want to make sure this isn't a glitch + the game hasn't just given up on killing her off.