diff --git a/cmd/client/game_render.go b/cmd/client/game_render.go
index abebae5..0bd36b4 100644
--- a/cmd/client/game_render.go
+++ b/cmd/client/game_render.go
@@ -509,9 +509,8 @@ func (g *Game) DrawGame(screen *ebiten.Image) {
 		text.Draw(screen, msg, basicfont.Face7x13, canvasW/2-40, canvasH/2, color.RGBA{255, 255, 0, 255})
 	} else if g.gameState.Status == "RUNNING" {
 		// Danger-Overlay: Ab DifficultyFactor > 0.5 rötlicher Bildschirmrand
-		g.stateMutex.Lock()
+		// stateMutex ist bereits seit Zeile 388 per defer gehalten – kein erneuter Lock!
 		df := g.gameState.DifficultyFactor
-		g.stateMutex.Unlock()
 		if df > 0.5 {
 			// Alpha von 0 (bei df=0.5) bis 60 (bei df=1.0)
 			dangerAlpha := uint8((df - 0.5) * 2.0 * 60)