Sibling connections missing on family tree

Product: The Sims 4
Platform:PlayStation 5
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.79
What expansions, game packs, and stuff packs do you have installed? All of them.
Steps: How can we find the bug ourselves? Just look at family tree
What happens when the bug occurs? Juniper is not showing as Sienna's Sister-in-Law only as Umber's wife. Grenn (I think) is showing as her nephew. When Sienna had a son, no one from Sienna's family is showing for him at all. It's like Sienna has no one. Also, Juniper and Umber had adopted children. None of them showed as any relation to Sienna at all. It's like they were just random NPCs. I deleted them.
What do you expect to see? I expect to see the appropriate family tree. It does create a problem for Visiting a Relative Milestone for infants as there aren't any for the infant (and there should be).
Have you installed any customization with the game, e.g. Custom Content or Mods? On console - never used.
Did this issue appear after a specific patch or change you made to your system? No

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Pretty self-explanatory. Just would be nice for Sienna Grove's family to be listed properly.