104 hr disbond
OK, I have had some further thoughts on this. The time since manufacture is what determines the extent of hydration if that is the cause of the disbond and hydration resitance is driven by the surface preparation at the time of manufacture. In this case, I doubt that this blade has been made long enough for the disbond to be hydration related. I suspect that it may be a localised contamination problem, and therefore would not indicate a deficiency in the process itself.
I'd be surprised if there are further examples of such disbonds again.