'Non of the AirPods have a power button' - pricely my point.
AirPods and AirPods Pro both have appropriate cases. Their sensors detect when in ear or not, when not in case and not in use it doesn't take 75mins for deep sleep its 15-30mins.
The AirPods Max is a much more premium product and should NOT have to rely on a sleeve to place into deep sleep since the sleeve doesn't really protect the product which does not have an IPx rating (these are portable devices and if you're carrying them externally in your hand then some protection should've been offered ~ industry standard).
Less than 30 days after release now some owners are reporting increase batter drain.
Technically yes - a bug.
Yet RUSHED because 1) poor chose of a sleeve vs a case, 2) software should've had faster deep sleep non-use power state, and shouldn't have relied on the sleeve to accomplish this. Thus this bug would not have existed and it shows nobody tested this at length to discover the bug internally.