Never mind, I found out, it was a custom group named "Ranged" for my Ranged Fighters. But the issue is the same, I changed the work settings but changed them back to Zero completely. But every time someone from this group came back from a caravan, his own work settings got overriden by the custom group settings (everything Zero).

I deleted that group and created it again, without touching the work-settings. Now nothing gets overridden anymore.

You should add something like a reset-button or a switch to turn off the overriding of settings.

Go to your group, manage, presets - and click the reset symnol

Let me know if this helps

Sorry, I had fixed it by deleting the whole group and recreating it again. I couldn't recreate the error but I will give it a try, promised. You really should add a button where it says: "Override Values" or something like that.

I am having this bug too. I'd deleted a group... but they're cleaning trash only and standing/wandering once no trash remains. Reset presets (although I have none). No effect. They're still cleaning. They also wander (while drafted!) if their target is killed (cued: moving" is all I ever get when I tell them to do something and they just keep standing there).