Kettle starts rusting once I began boiling water

The kettle looked perfectly fine when I bought it and I liked its sleek steel texture for water boiling.

HOWEVER, once I started using it (by boiling just water only and nothing else, no acid etc) the rust spots started appearing on the inner bottom of the kettle. Before first water boil, the inner bottom was CLEAN and I didn’t see any spots or signs of dirt or contamination.

The more times I boil the more rust spots appear. I wonder if it’s still safe for drinking…

PLEASE 🙏🏻 educate me if someone knows what’s happening here and if I can do something to fix it and if the rust is harmful for drinking?

THANKS IN ADVANCE!