Breaks my typographic quotes definition

[mcepl]

Description

I have this in configuration for writing typographic quotes:

------------------------------------------------------------

-- require("nvim-autopairs").setup({
--   map_cr = true, --  map <CR> on insert mode
--   disable_filetype = { "TelescopePrompt", "markdown", "rst", "tex" },
-- })

------------------------------------------------------------
-- Simple Lua function to get typographic quotes based on spelllang
local function get_smart_quotes()
    local double_low_high = { de = true, cs = true, pl = true }
    local lang = vim.bo.spelllang or ""
    local active_langs = vim.split(lang, ",")

    for _, l in ipairs(active_langs) do
        local base = l:sub(1, 2):lower() -- Get "de" from "de_de"
        if double_low_high[base] then
            -- German/Czech „ “
            return vim.fn.nr2char(0x201E), vim.fn.nr2char(0x201C)
        elseif base == "fr" then
            -- French « » (with a &thinsp; inside)
            return vim.fn.nr2char(0x00ab) .. vim.fn.nr2char(0x2009),
                vim.fn.nr2char(0x2009) .. vim.fn.nr2char(0x00bb)
        end
    end

    -- Default fallback (English) “ ”
    return vim.fn.nr2char(0x201C), vim.fn.nr2char(0x201D)
end

-- Map " to insert the correct smart quote in Insert mode
vim.api.nvim_create_autocmd({ "FileType", "BufEnter" },
    {
        pattern = "*",
        callback = function()
            if vim.tbl_contains({ "markdown", "rst", "tex", "plaintex" }, vim.bo.filetype) then
                vim.keymap.set('i', '"', function()
                    local open, close = get_smart_quotes()
                    local line = vim.api.nvim_get_current_line()
                    local col = vim.api.nvim_win_get_cursor(0)[2]

                    local quote
                    -- for Unicode checking (not required here, because we
                    -- check for space only)
                    -- local prev_char = vim.fn.strcharpart(line, vim.fn.strchars(line, 0, col - 1), 1)
                    local prev_char = col > 0 and line:sub(col + 1, col + 1) or ""
                    if col == 0 or prev_char:match("%s") then
                        quote = open
                    else
                        quote = close
                    end

                    vim.api.nvim_put({ quote }, "c", true, true)
                    return "" -- Return empty string to prevent default quote insertion
                end, { buffer = true })
            end
        end
    })

Unfortunately, when I uncomment setup of nvim-autopairs the typographic quotes think stops working (even with disable_filetype configuration). Any idea why? Is there some way how to make the plugin not to break my mapping?

Mapping bug

1. provide result of command :verbose imap <cr>.

no mapping (in Czech)

Steps to reproduce

see above

Minimal config

see above