fix: delay when auto changing source

Author: haorenW1025

lua/completion.lua

@@ -122,6 +122,8 @@ function M.on_InsertEnter()
       if source.chain_complete_index ~= source.chain_complete_length then
         source.chain_complete_index = source.chain_complete_index + 1
         l_complete_index = source.chain_complete_index
+        manager.insertChar = true
+        source.triggerCompletion(false, manager)
       else
         source.stop_complete = true
       end

lua/source/ins_complete.lua

@@ -49,6 +49,8 @@ M.triggerCompletion = function(manager, mode)
       api.nvim_input(ins_complete_table[mode])
       checkEmptyCompletion(manager)
     end
+  else
+    insertChar = false
   end
 end