EnderDragon leave Egg after defeating her for the second time.

Hello today i encountered an issue with EnderDragon.

EnderDragon should leave an DragonEgg and large amount of EXP only when defeated for the first time but today i defeated her again and she left DragonEgg and Large amount of exp second time. It's not exacly a large issue but still it is an issue. This issue also occured way before 1.17 version of PocketEdition.