fix: reload view when bufnr is not valid

lua/nvim-tree/view.lua

@@ -294,6 +294,10 @@ end
 
 function M.open(options)
 	options = options or { focus_tree = true }
+  if not a.nvim_buf_is_valid(M.View.bufnr) then
+    HAS_LOADED = false
+  end
+
   if not HAS_LOADED then
     M.setup()
     HAS_LOADED = true