diff --git a/src/Cafe/OS/libs/proc_ui/proc_ui.cpp b/src/Cafe/OS/libs/proc_ui/proc_ui.cpp
index 11516470..061886ca 100644
--- a/src/Cafe/OS/libs/proc_ui/proc_ui.cpp
+++ b/src/Cafe/OS/libs/proc_ui/proc_ui.cpp
@@ -355,6 +355,8 @@ namespace proc_ui
 	{
 		if (!s_isInitialized.exchange(false))
 			return;
+		if (!OSIsSchedulerActive())
+			return; // CafeSystem shutdown in progress, OS functions shouldn't be called anymore. reset() will clean up state on next re-init
 		if ( !s_isInForeground )
 			CancelBackgroundAlarms();
 		for (sint32 i = 0; i < Espresso::CORE_COUNT; i++)