Bad conversion <ol type="a"> from ePub to azw3

[repilo]

Converting epub to azw3 I have found this error:

In the epub original, this code:
  <ol type="a">
    <li>Item.</li>

Is converted to azw3 as:
  <ol class="calibre16" type="a">
    <li class="calibre3">Item</li>

But it is displayed as "1. Item" instead of "a. Item".
This is because in the css the converter erroneously generates "list-style-type:decimal" without having to do so, as shown below:

.calibre16 {
    display: block;
    list-style-type: decimal;
    text-align: justify;
    margin: 0.6em 0 0.6em 0.65em
    }

Calibre 3.17
Windows 7 & 10
Thank you so much for your attention.

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased