Nick80

Hey everyone I am new to the forum, landed here after many google searches and can’t find an answer. I’ve had my 1.6 2019 Skoda Octavia estate for 1 month now and whenever I full tank the diesel I can hear it “swooshing around” whilst I drive. When I come to a stop there’s a thud with the fuel. when the fuel gets to about half a tank the noise gets quieter and then disappears after it’s under half a tank. Has anyone experienced this before? If so was it normal or was there anything needing fixed? I’ve owned an Octavia 2020 saloon and a 2018 superb estate in the past and have never heard the fuel move like I do in this Octavia estate. any help is appreciated, cheers