Menu bar problem on my iPhone in safari (newbie)

As attached my website got the bug that u can see the normal website threw half of the Menu bar when u open it. Would be awesome if anyone can help me with that issue.

https://preview.webflow.com/preview/fluence-35439f?utm_medium=preview_link&utm_source=designer&utm_content=fluence-35439f&preview=86e8dbdf3de8815d63c252b6a6ed4759&pageId=6005a43c05dfeda81c07a876&mode=preview