Client not connecting to Server when playing in Editor

Hello

I was testing some replication techniques, when I suddenly was presented with this when hitting play:


It seems like the client doesn’t connect to the server, and then loads the default level. This happens with both listen servers and dedicated servers. I haven’t conciously changed anything, although I might’ve accidentally changed some settings without realizing the consequences.

Does anybody know how to get the client to connect again?

Wait, what? When I uncheck “reliable” in one of the events in an actor’s blueprint, this behaviour disappears.
This is the one: http://i.imgur.com/nytNQy4.png (where the cursor is at)

Did I potentially discover a bug here? Or is this intended behaviour?