updating changelog

Author: BSd3v

CHANGELOG.md

@@ -9,6 +9,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - [#3279](https://github.com/plotly/dash/pull/3279) Fix an issue where persisted values were incorrectly pruned when updated via callback. Now, callback returned values are correctly stored in the persistence storage. Fix [#2678](https://github.com/plotly/dash/issues/2678)
 - [#3298](https://github.com/plotly/dash/pull/3298) Fix dev_only resources filtering.
 - [#3315](https://github.com/plotly/dash/pull/3315) Fix pages module is package check.
+- [#3319](https://github.com/plotly/dash/pull/3319) Fix issue where `ExternalWrapper` would remove props from the parent component, now there is a `temp` that is passed to check if it should be removed on unmount.
 
 ## Added
 - [#3294](https://github.com/plotly/dash/pull/3294) Added the ability to pass `allow_optional` to Input and State to allow callbacks to work even if these components are not in the dash layout.