Dead sims are not greyed out in the relationship panel/Family tree

Commenting to say this has been happening in my game for awhile now (started a bug report on the old forum, maybe a little over a year ago at this point?) and is indeed still happening in old and new saves. Seems to be random as well, two sims died of old age and one is properly greyed out and one isn't (they were twins so they died basically at the same time). Seems to impact sims both in and not in my family randomly.