Help! Objects won't show?

[Frost Moon]

I have a problem my fellow feral-hearters ;w; I'm a usual mapmaker, but recently, I stumbled across the problem of my objects not showing up "in-game". They show up in  my map-maker, but I tried to show the objects in my map, from going to Cape of Lost Worlds, and some didn't show up. Someone help me with this? Thank you! I've heard others have this problem, so Please help us fix it <3

[heartsgirl99]

You have to press export(s) button for them to show up ingame or they won't show up at all.