diff --git a/src/cascadia/TerminalApp/AppLogic.cpp b/src/cascadia/TerminalApp/AppLogic.cpp
index e9b22b4b1dd..ba6ae4feaf1 100644
--- a/src/cascadia/TerminalApp/AppLogic.cpp
+++ b/src/cascadia/TerminalApp/AppLogic.cpp
@@ -376,7 +376,11 @@ namespace winrt::TerminalApp::implementation
         }
 
         _dialog = dialog;
-
+        // GH#12622: After the dialog is displayed, always clear it out. If we
+        // don't, we won't be able to display another!
+        const auto cleanup = wil::scope_exit([this]() {
+            _dialog = nullptr;
+        });
         // IMPORTANT: This is necessary as documented in the ContentDialog MSDN docs.
         // Since we're hosting the dialog in a Xaml island, we need to connect it to the
         // xaml tree somehow.