MPL does not decrement Data at 1x or 2x warp

[DeMatt]

KSP version: 1.0.2.842 Windows 32-bit, Steam

What happens: The Mobile Processing Lab accumulates Science, but does not decrement Data, while flown at 1x realtime or 2x physics warp.

Mods: Stock

Steps to replicate:

1. Assemble a station including a MPL and enough scientists/data to run it at a respectable rate. E.g. 7x 3-star scientists + 500 Data yields a processing rate of about 6 Data per day = approximately 0.001 science per second.
   
2. Start the MPL running, leaving the right-click menu open to monitor the numbers.
   
3. At 1x realtime warp or 2x physics warp, the Science will tick up, but the Data will not tick down.
   
4. At 3x or 4x physics warp, or 5x or higher rails warp, the Science will tick up and the Data will tick down.