Stacked debuff expiration bug: starts expiring in 5 days, finishes in 3

[asanbr]

Latest beta 19

[Tynan]

There's another report of this too. Can you say how you make the bug occur? We can't repro this.

[asanbr]

All I know is that Zamora butchered a couple of people (the game says 10, so that's probably it) over some time period (2 days total from the first to the last sounds real)

And also someone else butchered one or a few corpses around the same time, which is why she also has the "we butchered humanlike" debuff.

I haven't reproduced it or ever seen it before. But also haven't butchered corpses in B19 before, so it wouldn't have happened.

It looks to me like the dates have just been swapped. It would seem completely correct to me if it starts expiring in 3 days and stops expiring in 5.

I could probably upload a savegame if that would help.

I have no mods installed.

[Kenneth]

I've tried reproducing this via butchering humanalikes, but had no luck.
Any further information on this is very much appreciated, a reproduction that always works or a savegame that has this being caused reliably would be great!