CK II - Introduce Heir event chain does not run through

[frmwrk123]

One line summary of your issue
Introduce Heir event chain does not run through

Game Version
3.0

What expansions do you have installed?
All of the above

Do you have mods enabled?
No

Please explain your issue is in as much detail as possible.
When introducing the heir to the realm the event chain starts and some number of related events pop up. But at some point it simply stops and never reaches the final event of the chain that adds the "Groomed to perfection" modifier.

The flag "introduced_heir" is set on the heir so I cannot restart the event chain. I also removed the flag via console, started the event chain again with the same result. The exact number of working events and the type changes but the result is always the same. My heir does not get the "Groomed to Perfection" modifier and also falls short of potentially getting opinion modifiers with the vassals.

The Britannia-IntroduceHeir save shows the situation before starting the event chain. The Britannia-IntroduceHeir-Failed save shows the situation directly after the heir becomes an adult.

Steps to reproduce the issue.
1. Load savegame Britannia-IntroduceHeir
2. Click on Introduce Heir on the heir of Britannia
3. Event chain will begin and a number of events pop up
4. Events stop popping up
5. Heir becomes adult and still does not get modifier "Groomed to Perfection"

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[frmwrk123]

In the newest game version, the issue is still present.

 

[Spaninq]

In the multiple playthroughs I've done since Holy Fury came out, I've discovered that grooming an heir to perfection happens *maybe* 10% of the time, at most. Most of the time, the event chain does pause and never finish, as this report indicates.