diff --git a/lua/cmp/context.lua b/lua/cmp/context.lua
index c7de4e5..9eaa7d6 100644
--- a/lua/cmp/context.lua
+++ b/lua/cmp/context.lua
@@ -65,6 +65,12 @@ context.new = function(prev_context, option)
   return self
 end
 
+---Return the context is invalid or not.
+---@return boolean
+context.invalid = function(self)
+  return string.sub(self.mode, 1, 1) ~= 'i'
+end
+
 ---Return context creation reason.
 ---@return cmp.ContextReason
 context.get_reason = function(self)
diff --git a/lua/cmp/core.lua b/lua/cmp/core.lua
index 9f71e76..bc96d5e 100644
--- a/lua/cmp/core.lua
+++ b/lua/cmp/core.lua
@@ -243,6 +243,10 @@ end
 ---Invoke completion
 ---@param ctx cmp.Context
 core.complete = function(ctx)
+  if ctx:invalid() then
+    return
+  end
+
   core.set_context(ctx)
 
   local callback = function()
@@ -265,6 +269,9 @@ end
 ---Update completion menu
 core.filter = async.throttle(function()
   local ctx = core.get_context()
+  if ctx:invalid() then
+    return
+  end
 
   -- To wait for processing source for that's timeout.
   local sources = {}