The three considerations, if your LAM (Light Assignment Module) is not working consistently, would be a good battery, good signal strength, and good smart device signal (e.g. iPhone, Android, etc.). Another option of communicating better with fixtures would be using the cloud option. Luxor Cloud requires facepack version 0.33 or higher. For more information, visit support section here to learn more.
NOTE: The Luxor ZD/ZDC models are not compatible with cloud connection.