Initrd stuck with linux_kernel_6_{13,14} on EFI stub: loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path

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If my generation uses linux_kernel6 {13,14} my system gets stuck on boot with the following message after selecting generation with said kernel: EFI stub: loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path. I’ve tried reinstalling the bootloader and applying debug, shell_on_fail flags from as it says in the manual / wiki (boot was still stuck on that message). Rebooting from a working kernel shows no boot entry at journalct (which makes sense, since it never reached stage 1). Everything works fine on linux_kernel_6_12 and lower.
Boot related entries in my config:

boot = {
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
    kernel.sysctl."vm.max_map_count" = lib.mkForce 2147483642;
  };
...
boot = {
    initrd.kernelModules = ["amdgpu"];
    kernelPackages = pkgs.linuxPackages_latest;
  };
...
  boot = {
    initrd.kernelModules = ["v4l2loopback"];
    extraModulePackages = with config.boot.kernelPackages; [
      v4l2loopback
    ];
    extraModprobeConfig = ''
      options v4l2loopback devices=1 video_nr=0 card_label="Droid cam" exclusive_caps=1
    '';
  };

FROM hardware-configuration.nix

  boot.initrd.availableKernelModules = ["thunderbolt" "xhci_pci" "nvme" "ahci" "usbhid" "usb_storage" "sd_mod"];
  boot.initrd.kernelModules = [];
  boot.kernelModules = ["kvm-amd"];
  boot.extraModulePackages = [];

Also nix-info output in case if needed:

lemm@lemm /home/lemm > nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.12.20, NixOS, 25.05 (Warbler), 25.05.20250327.5e5402e`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.24.12`
 - channels(root): `"nixos"`
 - nixpkgs: `/nix/store/xb087rbbnw0fdmx86s8wm86rh7da5afi-source`

I do use flakes with nixos-unstable branch