diff --git a/frontend/ui/data/keyboardlayouts/ko_KR_keyboard.lua b/frontend/ui/data/keyboardlayouts/ko_KR_keyboard.lua
index dc4458c0b..02a9e3571 100644
--- a/frontend/ui/data/keyboardlayouts/ko_KR_keyboard.lua
+++ b/frontend/ui/data/keyboardlayouts/ko_KR_keyboard.lua
@@ -26,9 +26,21 @@ local wrapInputBox = function(inputbox)
     if inputbox._wrapped == nil then
         inputbox._wrapped = true
 
-        -- helper function
+        -- helper functions
+        local copied_names = {}
+        local function restore_func_references(obj)
+            for __, name in ipairs(copied_names) do
+                local orig_name = "_" .. name
+                if obj[orig_name] then
+                    obj[name] = obj[orig_name]
+                    obj[orig_name] = nil
+                end
+            end
+        end
+
         local function copy_func_reference(obj, name)
             obj["_" .. name] = obj[name]
+            table.insert(copied_names, name)
         end
 
         -- override original implementations with helper object
@@ -82,6 +94,11 @@ local wrapInputBox = function(inputbox)
         wrap_touch_event_func_with_hghelper_reset(inputbox, "onTapTextBox")
         wrap_touch_event_func_with_hghelper_reset(inputbox, "onHoldTextBox")
         wrap_touch_event_func_with_hghelper_reset(inputbox, "onSwipeTextBox")
+
+        return function() -- return unwrap function
+            restore_func_references(inputbox)
+            inputbox._wrapped = nil
+        end
     end
 end
 
diff --git a/frontend/ui/widget/virtualkeyboard.lua b/frontend/ui/widget/virtualkeyboard.lua
index 6dbbe3216..b371f7a1c 100644
--- a/frontend/ui/widget/virtualkeyboard.lua
+++ b/frontend/ui/widget/virtualkeyboard.lua
@@ -666,6 +666,10 @@ local VirtualKeyboard = FocusManager:new{
 }
 
 function VirtualKeyboard:init()
+    if self.uwrap_func then
+        self.uwrap_func()
+        self.uwrap_func = nil
+    end
     local lang = self:getKeyboardLayout()
     local keyboard_layout = self.lang_to_keyboard_layout[lang] or self.lang_to_keyboard_layout["en"]
     local keyboard = require("ui/data/keyboardlayouts/" .. keyboard_layout)
@@ -685,7 +689,7 @@ function VirtualKeyboard:init()
         self.key_events.Close = { {"Back"}, doc = "close keyboard" }
     end
     if keyboard.wrapInputBox then
-        keyboard.wrapInputBox(self.inputbox)
+        self.uwrap_func = keyboard.wrapInputBox(self.inputbox) or self.uwrap_func
     end
 end