I got (several times already) a negative amount of resources.
Structure Type Mining facility
Carbon Stone Ice Iron
490 0 4.422 0
Metals Gold Diamond Credits
4.063 4.037 -978 0
This happens production replication if there ist not enough input.
If I try to withdraw something from this negative amount it is reset to zero.
I'm not sure wether the output is corrected or the negative resources are also added to the
replication output.