azw6 is new to me !. may need more brains on the case !
but what happens if you install kindle for PC and downlaod a copy form amzon into that. are the images still visible at that stage?
and in tha calibre editor, you should be able to view a list of all the images found withitn the book + their fiels names
and my last test of the day. if you configure calibre to use an external viewer ( kindle for PC) to view azw books,. then you can open the "within calibre library" copy in kinde viewer. which may add a clue.
IO will grab the free sample & see what I experience... arrives as azw in mu documents/my kindle content...so after acknowledgements I see 3 maps then PART 1, in the kindle reader. imports to calibre as azw3. and all looks good in calibre editor. I see the 3 maps, I don't see unknown appended to image files names.
so if you take the full book though that route ; A -> K for PC -> calibre you should be good to go. It s a workaround rather than an explanation, but that's all I can offer up. my workflow with bought books FWIW is to always go via K for PC .
the code that I see in calibre editor for the maps page is
Code:
<head>
<title>Queen of Fire</title>
<link href="../styles/0001.css" type="text/css" rel="stylesheet"/>
<link href="../styles/0002.css" type="text/css" rel="stylesheet"/>
</head>
<body id="5N3C0-406cc321359c43ba99b906274ab2e86c">
<div class="cover">
<img src="../images/00001.jpeg" alt="cover missing"/>
</div>
<div class="cover">
<img src="../images/00002.jpeg" alt="cover missing"/>
</div>
<div class="cover">
<img src="../images/00003.jpeg" alt="cover missing"/>
</div>
</body>
</html>