CK II - (3.3.0 YDSW) Not inheriting a saintly bloodline I probably should be

[Tarvok]

One line summary of your issue
(3.3.0 YDSW) Not inheriting a saintly bloodline I probably should be

Game Version
3.3.0 YDSW

What expansions do you have installed?
Jade Dragon,
Monks & Mystics,
The Reapers Due,
Conclave,
Horse Lords,
Way of Life,
Charlemagne,
Rajas of India,
Sons of Abraham,
The Old Gods,
The Republic,
Legacy of Rome,
Sword of Islam,
Holy Fury, All of the above

Do you have mods enabled?
No

Please explain your issue is in as much detail as possible.
There is a pair of screenshots here (https://imgur.com/a/emmRXfV) documenting the issue. Basically, I'm not inheriting a saintly bloodline that, if I'm understanding the descriptive text properly, I should be.

Grandpa was Baselios, with the Blood of Baselios. During his life, he earned a second bloodline, the Warrior Philosopher one. After he died, he was awarded a saintly bloodline. Finally, he also married his eldest daughter matralineally to a man who carried a second historical bloodline, the Blood of Bagrat.

My current character is the grandson of Baselios. He inherited his father's Blood of Bagrat. He also inherited his mother's Blood of Baselios and the Warrior Philosopher bloodline. He did not, however, inherit the saintly bloodline. I do not know why. Text suggests it should be matralineally heritable.

Steps to reproduce the issue.
None, yet, but doubtless I'll be trying this again. I'll need to generate a new saintly bloodline anyway, and I plan to try to accumulate more outside bloodlines via daughters, so I'll report back if another saint bloodline fails to inherit matralineally.

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[Tarvok]

Judging from the responses I got a /r/crusaderkings, it looks like the issue is that saintly bloodlines are not inheriting properly if the child dies before the bloodline is created.