Fix bug

main.go

@@ -226,6 +226,7 @@ func main() {
 		deltaTime := currentTime - prevTime
 		prevTime = currentTime
 		worldLock.Lock()
+		playerUpdateMutex.Lock()
 
 		// Catch up in case of a large delta time
 		for deltaTime > maxDeltaTime {
@@ -281,6 +282,7 @@ func main() {
 			resetMapProfilingCounters(&totalRenderTime, &totalScalingTime, &totalFrameTime, &frameCount)
 		}
 		worldLock.Unlock()
+		playerUpdateMutex.Unlock()
 		enforceFrameRate(currentTime, 60)
 	}
 }