Can Confirm. I had the same bug, when they say num , 5 and 0 what they are referring to is the following

Keybind=5 Which targets nearest npc

keybind=0 which is the confirm keybind.

You need to do this and set these keybinds up if you want to interactr when you get the bug. It DOES NOT require you to wait for someone to target off of.