Getting this too.
What I've noticed is that in the Sound > VOID > Properties > Advanced > Default Format sample rate is set to just one selection that can't be changed and it looks to be quite low in terms of quality. Not even DVD level (though I can't see for sure what it is ATM as I don't have the Corsair app installed any more).
However, after I uninstalled the Corsair utility app and then reviewed the same I can choose, for example, 2 channel, 16 bit, 48000hz (DVD Quality) out of several selections and at that level, I don't get the crunchy, static effect when actions are performed in game.
In my case, the game I've noticed it in is Fortnite, when farming trees and brick. There's a scratching, static noise that accompanies the end of an action. This doesn't happen when this setting it set to the above sample rate. I've double checked this with my main 5.1 speakers also, setting the sample rate down to that which appears to be locked when the Corsair app is installed and it produces the same static-y result.
So, in summary, the Corsair app seems to be locking the VOID sample rate very low and it cannot be manually altered unless the Corsair app is uninstalled, at which point you're left with a 2 channel VOID. This causes the noise.
As some background to my situation, I installed Windows 10 completely afresh after upgrading my PC hardware at which point this issue became immediately apparent. It was not apparent on my prior setup but I can't say what version of the Corsair app I was using. It will have have been an older version, as I recall it throwing an error when looking for updates. This in turn could mean that me grabbing the latest version of the Corsair app, thus newer code, is looking to be the root of the issue.
Hope this helps, as running games in 2 channel stereo is not why I spent so much money on these.