When I entered the end in this Minecraft version (1.17.40), the end platform moved up one y-level. Normally when I entered the end, it would generate at the y-level of 48. However, this time, it is generated at y = 49 instead (hence, I stood on y = 50 in the attached picture). I also attached the image to this issue as well. The first picture shows the change in the position of the end platform from the side. You can notice that the platform moves up one y-level compared to the hopper below which is used for my obsidian farm. Hence, my obsidian farm looks off in this picture. The second attached picture shows the coordinate when I stand on the platform. You can notice that my y-level is 50.