User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36

Steps to reproduce:

When an unordered list is nested in an ordered list, TB gets it wrong.

An .html file containing the below is rendered as a list with items 1,2,3, with a nested bullet after #2., This is correct.

But if I use TB in the usual way to create this list, the items are numbered 1,2 and 2. This is incorrect, though the html is correct.... i.e. the same incorrect result is rendered if I use TB's "insert html" with the below.

Here's the simple example:

<ol>
<li> four score </li>
<li> and seven years ago </li>
<ul>
<li> our forefathers </li>
</ul>
<li> brought forth upon this continent a new nation </li>
</ol>

Actual results:

1. four score
2. and seven years ago
   ◦ our forefathers
3. brought forth upon this continent a new nation

Expected results:

1. four score
2. and seven years ago
   ◦ our forefathers
3. brought forth upon this continent a new nation

For some reasons, "actual results" above are showing up incorrectly. The actual result is as described, with item #2 appearing twice.

I can confirm this for TB78.10 but it's OK in current TB Trunk build.
So dupe of Bug 1548753

Can you tell me when this fix will be included on the release update channel? Unless I'm mistaken, this problem has been around for at least a year.

See Bug 1548753 comment #88