Turn 130ish into a Clan Eshin campaign I finally got to using Snikch's overthrow mechanic and I believe it has bugged the game out on the end turn. Here's what I experienced.
Upon using the ability the entirety of the Dwarves (around 30 settlements I think) all turned into greenskin rebels. I had one army at the Pillars of Grungi next to Karaz-a-Karak and attacked it the turn I used the ability. What I ended up seeing was a completely empty city. Meaning there was no army stationed there even when a flag representing a regular Goblin lord was in the city. There was also no garrison but the garrison said 0 for every orc settlement. I'll attach a photo to show what I mean. I unfortunately cannot pull up a photo of what it was like to attack the settlement, but the battlescreen was blank showing no greenskin force and the auto-resolve meter said I had 0 chance of winning with a full 20 stack of Skaven.
The other settlements in the South have present armies but no garrisons so they don't seem bugged. I'm not able to check since I cannot reach any settlement to attack at the moment. When I end my turn the game progresses just fine until it gets to The Golden Order which it freezes than crashes the game.
What I think is happening is there is another settlement somewhere up North in the fog that I cannot see that is glitched or bugged similarly to Karaz-a-Karak and the Golden Order has went ahead and attacked it causing the game to crash.
I hope this helps somewhat, if you need me to provide with a copy of my campaign can hand it over. I did mod it but with nothing extreme and all mods were deemed updated and compatible with the launcher. If any staff need a list of mods I can provide them on request.