Job percentage freaks out when objects are printed "in sequence"

Wat?

Not really a help request as such, but just highlighting the fact that something freaks out when objects are printed "in sequence" rather than all together layer by layer.

I mean, the numbers are absolutely insane. Including negative.
image

Logs? I see a fair amount of plugins being used, and some of them can affect the remaining print time. Also, what slicer did you use?