Ender Dragon Bug

Hello Mojang employees,

Today I went to the End to fight the Ender Dragon, on a copy of my survival world. Cheats are not enabled on my world. But as soon as I got closer to the dragon, 3 more spawned in. In just a matter of minutes, I died. No surprise, because who can fight 4 dragons at the same time. I’m very lucky that it was on a copy of my world. My game difficulty was on easy, in case you need to know. I was the only player on my world at the moment. However there was only 1 dragon when I entered the End. That lasted for about 10-20 seconds before I saw the other dragons. I hope that this bug gets fixed, because I’m probably not the only player with this issue. Thank you very much.