Hello there,
I found a problem in the forum. Here is the bug report:
Issue: The option to delete topics disappears when the option to delete answers is clicked. It Should Happen: pressing delete will get an undo option. It is automatically deleted after 1 hour. Issue Start Date: 08/20/2021
Also happening on my end. If you didn’t understand it clearly, when you press the delete button once, the second time you try to do it, the button will be gone, and the message won’t be deleted.
As you can tell, this issue isn’t very impactful and has an easy workaround (refreshing), hence it hasn’t been prioritized. The report can stay open but this isn’t likely to get more priority soon since it’s such an edge case, also this would have to be addressed in the Discourse code base and is not Roblox-specific.