Forcing PU while regency

[Nacond]

Hi! in my current game with Savoy I'm forcing a PU over Portugal. My king died during the war, so currently I'm having a regency council.

I forced the PU on January 2nd and immediately lose it at before February 1st (I think it's always the 29th of January). Has this alway happened? (losing the PU not only when the ruler dies but also during a regency)
Is there any way to prevent losing the PU while I have the regency council? (opinion is -193 because I just forced the PU, also can't send an diplomat to Portugal until the PU breaks)

Is it bad timing of my ruler dying or a bug?

The wiki says some reasons of a breaking PU but none like "forming PU during a regency".

I understand that a dying ruler ends the PU, I was also thinking changing from regency council to the new ruler might check again but not during the regency? (Burghers regency by the way)

Also I read something like:
"It is probably due to the event Estate's Leadership Challenged. It is bugged in multiple ways and one of them is that it can happen for a junior partner and break the union that way. You might be able to prevent it if you increase the influence of the estate which is challenging the union in Castile(you should be able to see it by looking at the tooltip for the regency in their country after they became independent), so that the event happens for you and you can give the regency to that estate. But the estate which currently leads the regency must have less than 70 influence in your country."

Could this be a reason? The Burghers have an influence of 60 - can bring them up to 62 when selling crownlands and 67 after giving out a mission but I guess thats not enough... is there anything else I could do? (except just accepting Portugal leaving the PU)

EDIT: got the to over 70 influence - still lost the PU on January 29th, no idea what to do.

Also I'm really confused about the 29th and not the 1st of February?

Thanks a lot!
Nacond

 

[grotaclas]

Also I read something like:
"It is probably due to the event Estate's Leadership Challenged. It is bugged in multiple ways and one of them is that it can happen for a junior partner and break the union that way. You might be able to prevent it if you increase the influence of the estate which is challenging the union in Castile(you should be able to see it by looking at the tooltip for the regency in their country after they became independent), so that the event happens for you and you can give the regency to that estate. But the estate which currently leads the regency must have less than 70 influence in your country."

Could this be a reason? The Burghers have an influence of 60 - can bring them up to 62 when selling crownlands and 67 after giving out a mission but I guess thats not enough... is there anything else I could do? (except just accepting Portugal leaving the PU)

EDIT: got the to over 70 influence - still lost the PU on January 29th, no idea what to do.

Is Portugal still in an estate led regency after your PU breaks? Then this is probably the reason for the breaking of your PU. Like I describe in the comment which you quoted you would have to find out which estate is leading the regency in their country after the PU breaks. And then you must make that estate lead your regency before that. But that would require you to get the Estate's Leadership Challenged yourself and I don't know if your PU would break from negative opinion if you choose the option to replace your regency.

 

[Nacond]

Thanks for your input.
They changed to nobility or don't know what they are called in English. After some days of griefing I just accept it - truce ends 1550, my claim 1556 so still time left - although I'm a little bit concerned about Castilles ambitions

They have a truce only until 1539 (currently its 1536) so I need to pay attention because they are also my ally... (and I can't attack anyone for the next 8 years)
also portugal has no allies currently otherwise I could try to white peace them (after getting a ruler and possibility to go to war)

 

[Big Bad France]

Is your new king ascending to the throne on January 29? I believe you lose a PU over anyone with negative relations whenever a ruler changes. In this case, you are exchanging the regent for the king.

 

[Nacond]

Is your new king ascending to the throne on January 29? I believe you lose a PU over anyone with negative relations whenever a ruler changes. In this case, you are exchanging the regent for the king.

No strangely not, he's 7 years old at that moment. Most likely the change from the burghers to the nobility in the Portuguese government may be the reason.

Decided to go on again and forced the PU another time on Portugal (although I had to trade many favors with Castille to break their alliance). But I'd still be interested in the reason for the breaking PU so if anyone got an idea I'd love to hear about it