Sappers digging at walls far away from base.

[KomischerTypus]

I have a problem with sappers destroying my beautiful map when they attack me. As you can see the sappers are digging at walls that are extremely far away from my base and even valueables. I don't know how to find out what mod is causing it (or if it is even a mod) so sorry in advance. The console isn't showing any error so the mod has to alter the sappers ai somehow. Any help is apreciated!

mod list: https://pastebin.com/230AFwg2

[Canute]

Hi,
sapper arn't very clever anyway, they try to get to closest way to your base, and when there are some mountain sometimes they dig through instead to path around.

You can try to disable mod's that don't add any content to the gameplay. Maybe that made the sapper's more clever but i don't think so.
Or just read the mod description of any mod you used (does the sapper are from a special race/faction then read these description too).

Or try the mod "Alternative Sapper AI".

[Quibs]

I think that's vanilla behaviour. Sappers will 'short cut' by mining, even when they're still far from your base.