When using spawn eggs obtained from Creative mode in Survival mode, the host device will spawn the mob and then consume the egg when used. Any connected device in multiplayer using spawn eggs will still spawn the mob, but the egg will not be consumed (allowing for unlimited spawnings with only 1 egg). This issue can be consistently replicated using iPad 2, iPad Air, iPad mini 2, Galaxy Tab 4 and Acer Iconia B1-770 tablets (using each device as the host or connected devices) with the same result.