We currently have 27 open bug reports for markdown rendering and most of those are of the type:
The preview shows X, after posting it shows Y
where X and Y can be any markdown/html that you can dream-up.
One of the latest incarnations was Stack Overflow URLs in double quotes in answers are not replaced by the name of the question where I decided it might be better to lump similar bugs together so after some research I duplicate voted against Editor preview disagrees on link title.
After the community review was complete the post was indeed closed as a duplicate. One user voted to leave open, 3 others voted to close. In the comments I was pinged for selecting a not fitting duplicate and the alternative of leaving the bug report simply open might be a better option.
I'm not sure now what is better. Do we help the poor SE developer that has to fix all these bugs by linking but not closing such reports or do we start closing against a reasonable duplicate target? In that case which target would that be?