An antenna connector in close proximity to its mate will still pick up a signal, but that is nothing as good as when it is connected properly.
Check that They are indeed connected. The connector should not come off the module when the module is slowly & gently moved. The connector has a very distinct click when it seats.
Also I have noticed that the orientation of the laptop is important due to the metal screen cover - that the antennas are in. Other laptops sometimes place them in the, plastic fiddly bits.
But overall it works great.
Contact support if the antennas are firmly seated - they have things to help you.