bug: macro execution with :normal @x

[pteroctopus]

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Neovim version (nvim -v)

NVIM v0.9.5

Operating system/version

Ubuntu 22.04

Describe the bug

When macro is executed in command mode with :normal @x and macro contains entering a command in command mode where ^R will be used to get content of the register: neovim will freeze.
If Ctrl+C is pressed the following error message will be printed:

E5108: Error executing lua Keyboard interrupt
stack traceback:
        [C]: in function 'getchar'
        ...al/share/nvim/lazy/which-key.nvim/lua/which-key/view.lua:96: in function 'read_pending'
        ...al/share/nvim/lazy/which-key.nvim/lua/which-key/view.lua:281: in function 'on_keys'
        ...al/share/nvim/lazy/which-key.nvim/lua/which-key/view.lua:255: in function 'open'
        ...al/share/nvim/lazy/which-key.nvim/lua/which-key/init.lua:49: in function 'show'
        [string ":lua"]:1: in main chunk

More details in reproduction steps.

Steps To Reproduce

1. Create a file reproduce.txt with: touch reproduce.txt
2. Open file with neovim: nvim reproduce.txt
3. In file write two lines with content: this will be replaced with content of register i
4. Record folowing macro on first line. Use register x: :.s/this/^Ri/g (This macro will replace all words this on current line with content of register i)
5. Execute macro in command mode with: :normal @x
6. Neovim will freeze
7. Press Ctrl+c to get error written in description

If the same steps are done in neovim instance without WhichKey plugin problem will not happen.

Expected Behavior

Neovim using WhichKey plugin should not freeze and error should not happen when macro is executed with :normal @x when macro uses retrieval of content of register in command mode.

Repro

-- DO NOT change the paths and don't remove the colorscheme
local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({ "git", "clone", "--filter=blob:none", "https://github.com/folke/lazy.nvim.git", lazypath, })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  "folke/tokyonight.nvim",
  { "folke/which-key.nvim", config = true },
  -- add any other plugins here
}
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

vim.cmd.colorscheme("tokyonight")
-- add anything else here