PS5 trophy : Power Corrupts bugged ?

[Own3d74]

Hello there.
I tried 5 times to get the trophy "Power Corrupts" but he never poped. Of course Ironman actived. Ps5.

Tried in HRE as bohemians, got enough votes forced and inherited HRE but nothing.
Tried 3 times in Danemark, got enough votes forced and inherited kingdom but nothing.
Tried 1 time in Sweden (as Danemark) got enough votes forced and inherited kingdom but nothing.
I recorded 15 min (in french but easy to understand) to show my moves :

at 9.15 min, you can see I have enough votes so I go to murder my daddy king , and got him of course

someone can help me to get the platinum please ?

 

[Own3d74]

up pls

 

[Own3d74]

Up pls , it's my last trophy to get the platinum

 

[Own3d74]

Done ! restart the 6th times in Danemark and finally got it ! Platinummmmm