Probably not really a bug but, I know that “standard” Markdown discussions are somewhat fraught and this question seems to not be dealt with in the latest ComonMark spec but…
It appears that, in accordance with at least one (the Ghost project) guide of the CommonMark spec:
should give you a
strikethrough (and it does) but
should give you a ==highlight== text - and it doesn’t.
Attempting to use <span style=“background-color:yellow;”> tags or other means seems to also not work for me…
So, based on the CommonMark used by Discourse, is there a way to do text highlighting? Is there a better guide for us to use to get answers to questions like this?