diff --git a/CHANGELOG.md b/CHANGELOG.md
index d14d0776..1597f368 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -65,6 +65,7 @@
 - Bugfix: Fixed command triggers showing as '/...' when the value is longer than the column width. (#6369)
 - Bugfix: Fixed a crash that could occur when making HTTP requests from a timeout handler. (#6375)
 - Bugfix: Fixed a setting description not filtering correctly on search. (#6389)
+- Bugfix: Fixed the split input not updating its height upon tab-completion. (#6411)
 - Dev: Mini refactor of Split. (#6148)
 - Dev: Conan will no longer generate a `CMakeUserPresets.json` file. (#6117)
 - Dev: Pass `--force-openssl` when installing from CMake in Qt 6.8+. (#6129)
diff --git a/src/widgets/helper/ResizingTextEdit.cpp b/src/widgets/helper/ResizingTextEdit.cpp
index cb373e99..77a677d7 100644
--- a/src/widgets/helper/ResizingTextEdit.cpp
+++ b/src/widgets/helper/ResizingTextEdit.cpp
@@ -301,6 +301,7 @@ void ResizingTextEdit::insertCompletion(const QString &completion)
                     prefixSize);
     tc.insertText(completion);
     this->setTextCursor(tc);
+    this->updateGeometry();
 }
 
 bool ResizingTextEdit::canInsertFromMimeData(const QMimeData *source) const