Normally not.
I have that problem sometimes to. I Don't know what's the problem. Maybe it's the kind of Map or the Surface, or something doesn't load in the right kind. Please try a other kind of map, just to see if it is working and tell me whats happen.
I Just can say, that i'm only use vanilla game stuff to build my assets. I wasnt using any workshop or dlc stuff. So i guess thats a game bug and i'm not able to fix that. I'm sry. =0/

have a problem, the fountain does not appear in game, do i need some other asset or something?

Das freut mich zu hören!
Danke =0)

Der gefällt mir gut! :-)