"Move lines" is triggered undesired when editing c++ project?

[lainegates]

I use lazy.nvim for my c++ project.

A very very weird thing happen that j / k will trigger "Move Line Up/Down" even in neo-tree.

c++ line will be moved up/down when pressing j/k after pressing <esc><esc><esc> will move line up.

But the thing doesnot happend other projects, e.g. python projects for .py/.sh/.txt/... files.

This behavior disappear when I comment shortcut-key for <A-j>/<A-k> in ~/.local/share/nvim/lazy/LazyVim/lua/lazyvim/config/keymaps.lua

-- Move Lines
--map("n", "<A-j>", "<cmd>m .+1<cr>==", { desc = "Move down" })
--map("n", "<A-k>", "<cmd>m .-2<cr>==", { desc = "Move up" })
map("i", "<A-j>", "<esc><cmd>m .+1<cr>==gi", { desc = "Move down" })
map("i", "<A-k>", "<esc><cmd>m .-2<cr>==gi", { desc = "Move up" })
map("v", "<A-j>", ":m '>+1<cr>gv=gv", { desc = "Move down" })
map("v", "<A-k>", ":m '<-2<cr>gv=gv", { desc = "Move up" })

What may cause this?

I don't want to change lazy.nvim repo, so I tried follow the official-doc to disable key-map for <A-j> / <A-k> in ~/.config/nvim/lua/plugins/custom.lua, but failed.

-- disable line undesired movement while editing c++ files
vim.keymap.del("n", "<A-j>")
vim.keymap.del("n", "<A-k>")