Have the 55 inch Q90T and I'm having some issues with it. The main one is horizontal lines or waves moving up the screen constantly. This only occurs in game mode using any of the HDMI ports. The only way to remove them from the TV is to activate Game Motion Plus but I don't want to use this as it adds input lag and reduces picture quality even further than Game Mode already does. It's worth noting this doesn't seem to occur when playing games at 120hz either, such as Fortnite or Cold War.
Any suggestions? I'm looking to return the TV but was hoping for a solution before I do.