[watani]

So I've gone ahead and deleted all of the books I've uploaded to the Fire HD 8. Following that, I performed a soft reset and cleared the cache partition. (I haven't found any way to clear the data of the reader app, however.) I then uploaded about 20 books onto the Fire HD 8 through Calibre.

Now when I try to perform searches the Fire HD 8 just shows a spinning ring after I select the word to search. As for the word suggestions, sometimes it shows the list of autocomplete words after a bit and other times it also gets stuck on the spinning ring.

Is this a sign that the indexing is hopelessly corrupt and only a factory reset will solve the issue? Or just that the indexing is ongoing and needs to complete? Some of the books I uploaded are 5000+ pages according to Calibre's Count Pages plugin, so they're pretty long.

One worrying thing is that I'm noticing that my search history is being saved for the various books even though I fully deleted the book and performed a soft reset. That indicates that the Fire HD 8 is still somehow saving information about the books through the soft reset and cache clear.

What's strange to me is that in the past, when I uploaded a book through Calibre and tried searching it would usually immediately start populating results. Or is that a false impression that I got when the book had already been indexed between when I uploaded it and started reading?

Edit: After choosing a word and letting the Fire HD 8 sit searching a book (1600 pages) for 10 minutes, it finally returned a full list of results of that word. Does this mean indexing only occurs while I have the book open?