Black screen parts after "RUN" button is pressed

Hello! When i press the "RUN" button to preview my game or the progress so far i have black screen parts in unity, when i press the button again (stop previewing) everything goes back to normal view. What causes this issue and how to fix it ? (On my laptop everything is good and this issue doesnt appear) Before the "RUN" button is pressed and the second screen is when the "RUN" button is pressed and preview is active.