diff --git a/implementations/Crafter.Graphics-Device.cpp b/implementations/Crafter.Graphics-Device.cpp
index b5c283c..016242a 100644
--- a/implementations/Crafter.Graphics-Device.cpp
+++ b/implementations/Crafter.Graphics-Device.cpp
@@ -223,6 +223,11 @@ void Device::handle_global_remove(void* data, wl_registry* registry, uint32_t na
 }
 
 void Device::pointer_handle_button(void* data, wl_pointer* pointer, std::uint32_t serial, std::uint32_t time, std::uint32_t button, std::uint32_t state) {
+	// Defensive: compositors can deliver pointer events without (or after)
+	// a matching enter — observed on sway during input-device hot-plug.
+	if (focusedWindow == nullptr) {
+		return;
+	}
 	if (button == BTN_LEFT) {
 		if(state == WL_POINTER_BUTTON_STATE_PRESSED) {
 			Device::focusedWindow->mouseLeftHeld = true;
@@ -243,6 +248,9 @@ void Device::pointer_handle_button(void* data, wl_pointer* pointer, std::uint32_
 }
 
 void Device::PointerListenerHandleMotion(void* data, wl_pointer* wl_pointer, std::uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
+	if (focusedWindow == nullptr) {
+		return;
+	}
 	Vector<float, 2> pos(wl_fixed_to_double(surface_x), wl_fixed_to_double(surface_y));
 	//Device::focusedWindow->lastMousePos = Device::focusedWindow->currentMousePos;
 	Device::focusedWindow->currentMousePos = pos * Device::focusedWindow->scale;
@@ -267,8 +275,12 @@ void Device::PointerListenerHandleEnter(void* data, wl_pointer* wl_pointer, std:
 }
 
 void Device::PointerListenerHandleLeave(void* data, wl_pointer*, std::uint32_t, wl_surface*) {
-	Device::focusedWindow->onMouseLeave.Invoke();
-    focusedWindow = nullptr;
+    // Sway has been observed to send a second leave after focus is already
+    // gone (input-device hot-plug) — don't crash on it.
+    if (focusedWindow != nullptr) {
+        focusedWindow->onMouseLeave.Invoke();
+        focusedWindow = nullptr;
+    }
     // Drop any sub-detent scroll remainder so it can't leak into whatever
     // window the pointer enters next.
     scrollDetentRemainder = 0.0;