When I enter an ordered list in Safari 14, the outdented numbers disappear as soon as I type the space after the number. The same ticket in Firefox appears properly.
Inspecting the DOM shows that the <li> has list-style-type:none in Safari 14, but correctly shows list-style-type:decimal in Firefox when viewing the same ticket.
Not sure why different browsers get different CSS.
I tried to report this as a bug, but that path led me here.