diff --git a/CHANGES.md b/CHANGES.md
index dda6ea314c7..37b3715e34e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -28,6 +28,7 @@ Apollo 2.2.0
 * [Bump springboot version from 2.7.9 to 2.7.11](https://github.com/apolloconfig/apollo/pull/4828)
 * [[Multi-Database Support][h2] Support run on h2](https://github.com/apolloconfig/apollo/pull/4851)
 * [Fix the issue that env special case handling is missing in some case](https://github.com/apolloconfig/apollo/pull/4887)
+* [Fix the issue that namespace content being cleared when identical content is pasted into the namespace](https://github.com/apolloconfig/apollo/pull/4922)
 
 ------------------
 All issues and pull requests are [here](https://github.com/apolloconfig/apollo/milestone/13?closed=1)
\ No newline at end of file
diff --git a/apollo-portal/src/main/resources/static/scripts/directive/namespace-panel-directive.js b/apollo-portal/src/main/resources/static/scripts/directive/namespace-panel-directive.js
index 974c599d5f2..80ace173339 100644
--- a/apollo-portal/src/main/resources/static/scripts/directive/namespace-panel-directive.js
+++ b/apollo-portal/src/main/resources/static/scripts/directive/namespace-panel-directive.js
@@ -989,16 +989,8 @@ function directive($window, $translate, toastr, AppUtil, EventManager, Permissio
                     })
                 },
                 onChange: function (e) {
-                    if ((e[0].action === 'insert') && (scope.namespace.hasOwnProperty("editText")) && (scope.namespace.editText.length === 0)) {
-                        let text = ''
-                        for (let i = 0; i < e[0].lines.length; i++) {
-                            if (i === 0) {
-                                text = e[0].lines[0]
-                            } else {
-                                text += '\r\n' + e[0].lines[i]
-                            }
-                        }
-                        scope.namespace.editText = text
+                    if ((e[0].action === 'insert') && (scope.namespace.hasOwnProperty("editText"))) {
+                        scope.namespace.editText = e[1].session.getValue();
                     }
 
                 }