I:R - Non-Dahae tribes are triggering parthian hordes event, killing my ruler (multiple times per run)

[TheWorstPro]

Description of problem
Non-Dahae tribes are triggering parthian hordes event, killing my ruler (multiple times per run)

What game version are you running?
2.0.1

What platform are you playing on?
Steam

Please select any/all DLC you have enabled.
Epirus flavor pack, Magna Graecia Content Pack, Epirus Content Pack

Do you have mods enabled?
No

Please explain your issue is in as much detail as possible.
Random himmalayan/Iranian states in the Northeast trigger the partian hordes event whenever Yuezhi is formed, and possibly other formable nations. From my understanding, this event should only happen once and after the beating of hooves event where the Dahae tribes are unified by AI. This event also gives me the strife modifier again, which makes it especially annoying. Because Yeuzhi can be formed multiple times throughout a single run due to the migration events, my rulers have been getting repeatedly assassinated throughout the course of the game and the only solution seems to be to conquer the entire Sogdiana and Himmalaya regions before they get a chance to descend into my lands with Yuezhi horse archers.

Steps to reproduce the issue.
Simply play as the Seleukids and wait for Yuezhi to form.

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[Freakkriek]

same here... lost 3 Basilei and counting...

 

[John MacWhat]

I noticed this affected an AI Seleukid Empire in my game

 

[Lewa263]

I've found the cause in the files. The event diadochi_flavor.100 that you have in the screenshot is triggered by a country that has the variable "horde_invasion_origin". There are two ways for that variable to be set. First is the one intended by the writer(s) of the Seleukid event: when the Parthian hordes are united. However, the same variable is set in the decision to become Yuezhi.