Why on earth would they do that?

Makes no sense at all.

In my case I selected it at time of booking over 2 months ago.

Not pleased, if it had been blocked back then I would have chosen 1K instead which has been available right up until T-72!

Why have the ability to book 1A/K as a gold benefit then use it as a crew rest seat? This is a complete joke!

I will be complaining about this, I'm thoroughly gutted!