Coolant needing top up often on the aveo 1.6 G3

[Brit01]

Still not tracked down any visible leaking which is causing me concern.

Could a leaky water pump hide any traces of dripping coolant? Burning off before it hits the ground or parts of the engine bay?

No smoke, clean oil, no smells or wet patches inside the car. No visible leaks around the coolant tank or engine bay/coolant pipes.
Baffled.

Will jack it up to see if I can see the water pump better and will check the radiator drain valve also. That is a little flimsy plastic plug at the bottom.

other than that next step would be to get a pressure test done