Anyone had their dual-mass flywheel go south, and if yes what were the symptoms?

I have an intermittent, brief drivetrain rattle that seems to occur anywhere between 2300 and 3200 rpm when accelerating lightly from low/no throttle, and I'm wondering if the polymer coupling between the flywheel masses is failing or failed.

Car is a 2005 997 with 50k miles.

Thanks