Objects are missing when the game is Build

Hi guys, I’m facing this problem for the first time (, It really give me an headache.
I know that I’m doing something wrong but I can figure it out (.

The problem is that when I’m Build & Run the game, it works perfectly for the first time, Until I close the game and relaunch the .exe again, it’s like deleting almost all the data. This is happening only to PC,Mac & Linux Standalone

As for the other devices like Web/Android/IOs it’s not working from the start ((.

In the Scene View, when I’m starting it, the game is working like charm.

I don’t have any gameObjects with the EditorOnly Tag.
My Camera’s CullingMask is at Everything.

My first thought is that Most of my objects I’m instantiating (this might be a problem), but there is an other fact, is that one of the object that is also instantiated is shown in the game )) and others not . (((.

or that the object that are missing or the scrips are not being compiled, but I don’t get, what is the reason for not being compiled (, When they are used in the Scene view.

I am reading the information for the levels from an XML file.

Most of my materials assets that are used for instantiating are in the Resources folder

Double posting is not allowed in this forum.

Im going to delete the other one.

I can’t (