Actually the Richard giving you the card without the Aunt sidequest isn't really a bug but rather one of the easter eggs within the game.
If you talk to the person on the left outside of his apartment before doing the mission it will make it as if you have done it already without doing so.
There are a couple of other easter eggs in the game that mistaken for bugs as well.
do you even know what ''easter egg'' in games means????? (well, also in movies etc etc)
il explain,,
easter egg : some visual reference to something out of that game world. aka some anime or movie easter egg. for example you find some dead body. and it happens to look like, lets say neagan from walking dead,, that would be walking dead easter egg...
or you for example, idk,, lets say fishing, and suddenly get one blue fish, and 2 orange fish heads comes out of water, that would be easter egg for ''finding nemo''
or like in borderlands, find the Buzz from ''toy story''...
in ''shadow warrior'' find the classic game version's easter egg, the naked girl washing in bath... thats EG within same game worl tho, but thats extraordinary case...
easter egg example in movies..
TV serial : Z nation
episode aired in dec 2015. had easter egg for a game H1Z1 that was released in jan or feb 2016. dont rem..
this you mention is a game bug, and/or missing code, or that was temporal switch holder that dev forgot to remove afterfinishing the quest line.... or if dev didnt know, or didnt have time to sort out all variables and switches, to make event work / fix it... he add the switch to something else..
or had it as secret (like the clock in the mansion, daughters room, when u save the japanese girl)
but it is NOT ''easter egg''.