diff --git a/GeneralsMD/Code/GameEngine/Source/GameClient/InGameUI.cpp b/GeneralsMD/Code/GameEngine/Source/GameClient/InGameUI.cpp
index 948756c41e6..087b5ac6160 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameClient/InGameUI.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameClient/InGameUI.cpp
@@ -2291,6 +2291,9 @@ void InGameUI::reset()
 
 	m_windowLayouts.clear();
 
+	m_observerNotifications.clear();
+	m_observerMilestones.clear();
+
 	m_tooltipsDisabledUntil = 0;
 
 	UpdateDiplomacyBriefingText(AsciiString::TheEmptyString, TRUE);