inlay hints only spark once after key in :RustEnableInlayHints

[sangshuduo]

I use https://github.com/NvChad/NvChad and add rust-tools and inlay-hints as customized plugin. Now it does not work with .rs file. But if I key in :RustEnableInlayHints, I can see it just sparked once about 0.5s then disappeared. I install clangd-extension.nvim works good with .c file. Expect inlay-hints and rust-tools do it as well.

here is my config.

    {'simrat39/rust-tools.nvim', lazy = false,
        config = function()
            local ih = require("inlay-hints")
            require("rust-tools").setup({
                tools = {
                    on_initialized = function()
                        ih.set_all()
                    end,
                    autosethints = true,
                    inlay_hints = {
                        auto = true,
                        show_parameter_hints = true,
                    },
                    hover_actions = {
                        auto_focus = true
                    },
                },
                server = {
                    on_attach = function(c, b)
                        ih.on_attach(c, b)
                    end,
                },
            })
        end,
    },