Rift used to be a game that I could not tab out of without having a bothersome time tabbing back into, if the game sound was on.
Tabbing back in could be a real pain in the ass, depending on how long I'd been tabbed out. All of the sound would blast out at once and the video would take a moment to catch up to the now point.
And this is on a SATA III SSD. Cannot imagine how it is for HDD-installed-Rift players. =S
So props on fixing that. I've been tabbed out for a good 10 minutes and I tabbed back in and the issue was not that at all.