[2020] Minimap keeps changing the way I see the map layout in my game and it's driving me crazy

So I'm having fun making this game I've been going all out on but the only thing bothering me when I playtest it is the minimap. I'm gonna describe how everything looks.

You got the map showing the area of the game itself and since I couldn't deal with enough space to put the lobby area somewhere else, part of it is visible on the minimap in the game's area. There's also something else constantly changing that really messes with me, and that's the way the barrier is shown. The barrier is right above the game's area, a nebula one acting as a roof.

For whatever reason, the game decides to make it sometimes visible on the minimap, covering up the game's area, or sometimes invisible. This is what really bothers me, because I'm not sure if I'd be able to cover this all up with a second barrier above the map if it were to go invisible on the minimap too.

I could try making a high roof way up top in the same look of the game's area to be right above it but I don't know how much space that would take up. I don't know if this is a big problem for anyone else, but with a lot of people saying that the barrier is an easy way to cover up your mistakes, I now feel like that's a 50/50 chance from my experience.