Yes there are more people with this issue (me included
)
From my tests i did, this might have a connection with how they grow, i will explain:
I used cheats on a playthrough to accelerate the process, so if you rescue your brothers from the hideout fast you wont have the issue with the points because you will be prompt that they need your attention to choose the options.
Now is this case like in the image i took 2 years to go there and save them and this is the result of that when they grow up.
It's not the first time this happened, but at first i thought that this issue could be similar to the brother's perks that you could choose the perks and sometimes not, but it seems not to be the case.
What i didn't test:
All factions - Sturgian, Battanian and Emperial it happens - missing Vlandian, Khuzait, Aserai ( didn't pay attention to this one )