bug: Bindings not honoring mode

[bagnaram]

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• I have read all the which-key.nvim docs
• I have searched the existing issues of which-key.nvim
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Neovim version (nvim -v)

NVIM v0.9.2

Operating system/version

Fedora 39

Describe the bug

I am unable to get the following keymap descriptions to be captured by which-key. I have read a bit about how modes are handled, however the following bindings below aren't being shown in the which-key dialogue.

init.vim:

" copy into system buffer
xnoremap <leader>y "+y
nnoremap <leader>Y "+Y

which-key.lua

local wk = require("which-key")

wk.register({
  f = {
    name = "file", -- optional group name
    f = { "<cmd>Telescope find_files<cr>", "Find File" }, -- create a binding with label
    r = { "<cmd>Telescope oldfiles sort_lastused=true ignore_current_buffer=true <cr>", "Open Recent File", noremap=false},

    -- additional options for creating the keymap
    n = { "New File" }, -- just a label. don't create any mapping
    e = "Edit File", -- same as above
    ["1"] = "which_key_ignore",  -- special label to hide it in the popup
    b = { function() print("bar") end, "Foobar" } -- you can also pass functions!
  },
  g = {
    name = "Neogit",
    mode={'n', 'x'},
    g = { "status" },
    l = { "Copy git permalink to clipboard", mode={'n', 'x'}},
    L = { "Copy git permalink to clipboard", mode={'n', 'x'}},

  },
  p = {
    name = "Project",
    p = { "projects" },
    s = { function() require("telescope.builtin").grep_string({
      search = vim.fn.input("Grep > " ) })
   end, "find" }
  },
  s = {
    name = "Search",
    f = { "<cmd>Telescope find_files<cr>", "Search File Names" }, -- create a binding with label
    p = { "<cmd>Telescope grep_string<cr>", "Search Project" },
  },
  o = {
    name = "Open",
    p = { "projects" }
  },
  b = {
    name = "Buffers",
    b = { "list" },
    k = { "kill" }
  },
  Y = {
    name = "Yank line to system buffer",
    mode = 'n'
  },
  ["<"] = "buffers",
},
{
  prefix = "<leader>",
  mode = 'n'
})

wk.register({
  ['y'] = {
    name = "Yank to system buffer"
  },
},
{
  mode = 'x',
  prefix = "<leader>"
})

Steps To Reproduce

1. Create the following keymaps in init.vim
2. Add the following mapping definitions to whick-key
3. Source configs and enter visual mode and press <LEADER>
4. Bindings aren't picked up in the dialogue.

Expected Behavior

I should see the keymaps

Repro

N/A

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