There is a bug in the revoltrisk setup of the 1419 scenario for Switzerland.
From
1419_Provinces_Misc.inc
It´s correct that Aargau was only conquered by the "Old eight Communities"/Old Switzerland in 1415. However in the current setup they have a national core on province 388. You can´t have nationalism in provinces you have a national core on so that line is simply ignored by the game.
Possible solutions:
If you want the RR to be in province 388 then you have to remove the national core and reduce it to a claimcore as the other 2 provinces - would make sense, as Switzerland in 1419 was really tiny and did not control even half of the area of the 3 provinces it has at the start.
OR leave the national core on 388 as the capital and remove the RR from 388 and instead have RR in 1612 and 1929 to simulate that Aargau was only recently conquered (1415) and Thurgau was still ruled by the Habsburgs until 1460.
german WIKI for a more accurate date of the annexation of Aargau late in 1415:
https://de.wikipedia.org/wiki/Geschichte_des_Kantons_Aargau#Eroberung_des_Aargaus
WIKI article in german that has two maps showing the (later) expansion of Switzerland that in 1419 had not yet happened:
https://de.wikipedia.org/wiki/Acht_Alte_Orte
My personal take on it would be the harshest for Switzerland but still manageable even for the AI:
in 1419_HEL_Switzerland:
no national provinces at all, only claimcores that later become national cores:
Code:
claimedprovinces = {
388 1612 1929
}
in 1419_Provinces_Misc.inc
Code:
province = { id = 388 nationalism = { year = 1416 month = january day = 1 } } #Neuenburg and Wallis
province = { id = 1612 nationalism = { year = 1415 month = july day = 22 } } #Bern province, Aargau conquered by Swiss in 1415
province = { id = 1929 nationalism = { year = 1419 month = january day = 1 } } #Thurgau and other cantons were aquired only in 1460