Factorio Forums

I haven't seen anything posted here or on Reddit about UPS issues, but I've noticed mine tanking here and there on really early progression (haven't even built purple science) where it absolutely wouldn't have, before (a year ago). Although I am playing on a custom map with large amounts of resources brushed in. Would that have an impact? If not, what gives?

while having the issue, hit F4 then enable 'show time usage'.
post a screen shot.