Background flicker on XFCE login

Help
1

Fairly new to the system. It’s a minor issue but when I log in to XFCE the background goes:
black → wallpaper → black → wallpaper
and I’m unsure how I might fix that. Can anyone point me in a direction?

Here’s my Nvidia/X config:

  hardware.nvidia = {
    modesetting.enable = true;
    powerManagement.enable = false;
    powerManagement.finegrained = false;
    open = false;
    nvidiaSettings = true;
    package = config.boot.kernelPackages.nvidiaPackages.legacy_470;
  };

  services.xserver = {
    enable = true;
    desktopManager = {
      xterm.enable = false;
      xfce.enable = true;
    };

    displayManager = {
      lightdm = {
        enable = true;
        greeters.gtk.enable = true;
      };
    };
  };