Game possibly causes overall system slowdown?

Might just be me, but does anyone else experience a slowdown in overall system performance after playing PSO2? i.e: After starting it up a couple times, or if it's been running for a while?

I don't experience it. I do, however, notice that when I close the game, it takes around 30 seconds to a minute with a darkened version of the game screen on top of everything before it disappears. This only happened after bypassing the launcher. When the launcher was used to start the game, though, there were no issues with that, but there was a lot of lag in the lobby.