A. Ensure that your iPhone and the vacuum are both connected to the same Wi-Fi network. Control issues often arise from connectivity problems. Restart your router and reconnect both devices to the network. Additionally, check for any firmware updates for the vacuum that might improve control mode functionality.
B. Try resetting the app's settings to default. Go to the app settings and look for an option to reset or restore default settings. This can sometimes resolve inconsistencies in control modes.