Pink End

Something strange has happened. While I went mining, my sister created an ender portal. She went in first and then a few seconds later, I jumped into the portal too. When I entered the portal, (I was in creative mode by the way,) the entire screen except for my pickaxe and the hub was pink. I used a Potion of Night Vision beforehand when I was mining which is what produced the pink light. I waited a few minutes but nothing happened. I could hear my sister firing her bow to defeat the enderdragon. I cleared my potion effect and pulled up the debug screen to take the second screenshot. Without the potion effects, my screen turned black. My sister teleported to me but couldn't see me. I then attempted to teleport to her, but still, no luck. I was invisible on her screen. Using /kill to send me back to my spawn point was the only way to return my screen back to normal.