Hey Vaheva,
I have seen this issue before, and in my experience this issue occurs when you set the Near Clip Plane within your project settings to 0.0. Check this setting to see if that is the case. The default value is 10.0 which works well in most cases. If you need to modify that value, I would stay away from 0.0 as that is expected to cause issues.
Let me know if you need further assistance.
Cheers,