Hmm… that is weird. I just tested again myself and events appear in the topic normally on my site. Are you updated to latest? Does it appear if you use /safe-mode and disable themes and theme components and unofficial plugins? If you look in the javascript console, do you see any errors?
Thanks for the suggestion, but that does not seem to be related to the problem described in the first post of this topic. @Nuenni have you been able to solve it? If not, I think the next steps are to look at safe mode to see if there are any theme components or plugins that are causing a conflict here.
You shouldn’t need to have the name specified for the event to show up. I just tested it again myself. If you don’t specify the name, it just takes the topic title and uses that as the name for the event.