File randomly full of unused pattern variable errors for substrings of the code

[Mehgugs]

As described in title, this happens on 2.8.0 via neovim.

Using a config recommended via slack for combatting this issue, to no avail. I additionally swapped out elm-test for elm-test-rs.

local function custom_attach(client)
  if client.config.flags then
    client.config.flags.allow_incremental_sync = true
  end
end

return {
  "neovim/nvim-lspconfig",
  opts = {
    servers = {
      elmls = {
        mason = false,
        rootPatterns = { "elm.json" },
        init_options = {
          disableElmLSDiagnostics = false,
          elmReviewDiagnostics = "warning",
          elmPath = vim.fn.exepath("elm"),
          elmTestPath = vim.fn.exepath("elm-test-rs"),
          onlyUpdateDiagnosticsOnSave = true,
          rootPatterns = { "elm.json" },
          skipInstallPackageConfirmation = false,
          trace = {
            server = "messages",
          },
        },
      },
    },
    setup = {
      elmls = function(_, opts)
        local default_config = require("lspconfig.configs.elmls").default_config
        local final_config = vim.tbl_deep_extend("force", default_config, opts, { on_attach = custom_attach })

        require("lspconfig").elmls.setup(final_config)
        return true
      end,
    },
  },
}