Hello
Thank you both for your help.
I have tried to double and triple the parameters
camera.clip_near = 10;
camera.clip_far = 150000;
But the problem is still the same.
In the .GIF from my original post I move along the y-axis, it jumps around a bit because the .GIF is looping back to the beginning.
Everything disappears when I jump from y=4600 to y=4800 and the x- and z-axis do not help to avoid it.
(My camera movement is relatively fast, that is intentional)
I have placed a couple of objects at y=6000, 8000, 10000 etc. but nothing gets displayed when the camera goes beyond 4800.
Really weird