Kerbal Space Program

When the ore tanks are full and your craft is drilling and converting (via ISRU) at the same time, the drilling proceeds at the maximum rate, even though the utilization of ore may be slower than the extraction of ore. The excess ore is not stored and is simply wasted. This can become a big problem when mining asteroids due to their finite ore. This issue is independent of time warp.

To reproduce:
1) A full fledged mining rig that contains:
- A 'Drill-O-Matic' Mining Extractor
- An ISRU Converter
- Sufficient electricity generation for drill and ISRU
- An engine of some sort helps but is not necessary
- The Klaw (for attaching to asteroid)
- Sufficient ore and fuel capacity
2) Position and attach to an asteroid
3) Deploy drill and start mining until max ore tank (drill will stop automatically, no issues up to this point)
4) Save at this point. Record the ore left on the asteroid.
5) Start converting with ISRU. (Note: ISRU rate must be slower than drill rate)
6) Record final ore left on asteroid when fuel and ore tanks are full.
7) Go back to save point. Switch off drill, then start ISRU.
8) When fuel capacity is full, turn off ISRU and start drilling until full ore capacity.
9) Record and compare both final asteroid ore amount.