I have been running the same problem over and over regarding First Person Feature / content pack. I made new project, new level and enabled First Person Game Mode in Project Setting after adding First Person Content Pack. It works fine in empty level but after sometimes, it just stop appearing when I play hit. Outliner showing BPFirstPersonGameMode and many other iteams which must be there but there is NO first person character anymore, nothing spawns, nothing appear. And when it happens in one level in a project, it happens in the others as well. I have created multiple projects with first person content pack / template but after sometime it just stops working. What I must be doing wrong here. Any help will be appreciated. Getting tired now.
When you say it stops appearing after a while, what do you mean? There must be a trigger which makes it disappear for you. Is it some code you have changed in the character or did you forget to save the level, etc?
There could be a save issue with your hard drive as well which could be the culprit.