Your RD is hitting your chain stay? I doubt it. I believe you that it's getting jammed up, just not because of your chain stay. It's not a specific trait to SRAM, just ease off for a half a pedal stroke.

I'm just guessing here, but I think the more 'in-tune' your FD/RD are the less likely this is to happen. I remember this happening to me in the past, but not since I started working on my own bike and getting everything really dialed in. So it might just be correlation that it doesn't happen anymore (since I probably soft pedal a bit and don't think about it) or it might be causation (because my drivetrain is better tuned now).

A suggestion that might help, increase b-tension on your RD. I might be totally wrong though, so take with a couple grains of salt.