BP disappears in World

Hi guys,

I’m fairly new to UE4. I know the basics. But yesterday, I ran into a problem when I tried to drag a BP into the world, I see the object in it and it disappears once I let go of the LMB. I made a new BP added a spear and that one was okay. I just need help figuring out what I should look at for troubleshooting the BP. The project itself is fairly heavy and I inherited it from a different artist. I don’t know what I should attach here for you guys to look at.

Where you simulating or in play mode? Changes made during these modes do not get saved to the level.

Furthermore,in G mode (toggle with the g button) you cannot see the blueprint icons, so it might still be there, but just invisible.