In the case of SI it seems to be a known situation, <a href="http://community.sigames.com/1/OpenTopic?a=tpc&s=21019056&f=66919117&m=7061987583 " target="_blank">http://community.sigames.com/1/OpenTopic?a=tpc&s=21019056&f=66919117&m=7061987583 </a> may be a useful reference...
It would seem that CM and OOTP are both assigned as 'high priority' and 'time-critical' applications, because at times they need a lot of processor power.
As I understand it, there is no simple way for them to redefine the task level continuously, either this is no way or it would be too performance depreciating.
Thus, they are continually assigned as high-priority and time-critical, and as such continue to recieve a lot of processing power even when not in use.
I wonder, if OOTP was always ran full screen like many other games people play, it wouldn't be noticed, and if indeed all games don't exhibit this behaviour.
In conclusion, I'd say it's not likely this will be resolved, but that's not an official policy
Darryl