Are you allowed to tell us what happened?
I mean, we don't really have a need to know, but tales of Murphy striking are usually interesting.
I don't have a clear understanding of what the issue was; I sort of doubt it would be all that interesting if I did; but I don't believe there was anything dark or sinister about it.
John Helfers is the fiction lead, so he's the one that's been handling getting new fiction onto the various markets. And between the various digital, print-on-demand, and audiobook platforms, it's such a byzantine process that I have to save what shreds of sanity I have left and trust John's long experience in publishing. I edited Interstellar Operations, and I can't wrap my brain around some of this stuff.
But I know enough to know that there's not always a logical (or, sorry, interesting) reason that Amazon does anything. The delay getting "Shell Games" on Amazon, for example, had to do with convincing Amazon (and/or possibly just Amazon's bots, algorithms, etc.) that the book was a new piece of fiction and not us trying to represent our product as a knock-off of another. Goofball stuff like that.
All I can say is, I suggest you do what I do: trust John, but please do call out if you see some kind of issue with the catalog.