Objects sometimes disappearing at varying distances in scene view, game view is fine

There are many objects, some skinned meshes, some meshes without skins and many of them also have sprites. I am using layers, but they are all rendering through the same camera. they are neither immense, nor tiny, almost everything is at or around a scale of 1 for all three axes. No plugins. they are not hidden, but many objects are instantiated at the start. I am having the camera issue with objects that are there and shown at the start as well as the instantiated ones. All objects appear as they are supposed to in the game mode and are clearly present in scene mode I just can't get close to them.

I had the same issue:

AS you can see in the images, a little differents on alttitude of Scene camera (not the object camera, i mean the scene view) makes some of the planes disappear and reappear in other alttitudes. This happens before press play, i mean, there are no scripts running...)

Is not like "at lower than X alttitude, it disapears.. no, its like from 150 to 100 disappear, but higger or lower fromt hat you can see them.

AS you see in the 3rd image, they are over the black background, so they are not behind, they are not rotated...

@$$anonymous$$AcDx :

Are they meshes? skinned meshes? sprites? They are 3D planes with Spripes/defaut material

Are you using layers and rendering them through different cameras? No, they are just one over other (3rd image)

Do these objects have immense or tiny scales? 3x1x90

Are you using vanilla Unity or do you have plugins and the like that contain editor scripts that might modify the game view? No, its just Unity 2018 vanilla

Are those objects hidden in some way and at the start of the game and then you activate/show them through code? No, and they are all static "Everything"