It's an older model. The bubble is not as supple as it once was. Leading technique is to take a martini straw and a camera lens dust blower and use the blower as a sucker and the straw to grab and pull out the impacted parts.
Easiest way is to take medium to light hold tape, painters tape or luthiers tape works, I usually use luthiers tape, and very lightly touch the driver with the sticky side until it gently comes out back to shape.
Important not to get too much on the driver so you don't stress the voice coil. This happens with our TPE driver in aeolus/atticus a lot when tube amp arching happens. Make sure to use non-marring tape like luthiers or blue painters tape etc. Or light masking tape at worst.
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