I Have the same problem as Saguaro5. I am using KSP interstellar extended, planetary base system, and station parts expansion redux.
Only the "science Laboratory" and "advanced mobile processing lab" show "data processing multiplier" value. both of these parts are from interstellar extended.
simple test showed that the rate decrease on saving is proportional to amount of data in the labs. I hope this information will help someone to solve this problem!
I figured out that what it does. It scales the processing rate ie science/day to the stock game rate as calculated inhttps://wiki.kerbalspaceprogram.com/wiki/Mobile_Processing_Lab_MPL-LG-2
I have two level 3 scientist giving a rate of 14.175 sci/day
I guess this is to keep the science rate reasonable. upgrading your lab allows you to store more data and science but it does not increase the rate that scientist can work!
