I've gotten into the habit of holding down the power button when I turn them on to put them into pairing mode (which disconnects them from the previous device).

The "affected range" is meaningless. It is all of them. I have had 2 with cracked headbands that are outside the serial range, so you cannot assume you are safe just because you are out of that range.

After my first pair's headband cracked after 2 months, the replacement just started developing the same cracks after only 3 weeks. The replacement has a serial of 5309623, which is outside of the range Sony claim is affected. It is a 4 month wait until the WH-1000XM2 are available here in the...