So I was flying in the End with elytra...
There was the usual lag with random "invisible walls" stopping flight for a second or two before the elytra deployed again. I flew for about 15k blocks like this. Then all of the sudden, my character stood up mid-flight, as if my elytra were non-existent. I had just repaired them a bit back, and heard no sound of them breaking (and I had headphones on, so I would have heard them).
While I missed the actual view of falling straight down, I did manage to record right before I died. You can see by how fast my coords are falling that I was going straight down (elytra were not deployed). Here's the video.
I doubt staff would refund me for this lag/glitch, but I thought I may as well check, as elytra are pretty valuable and mine had full enchants. I had a full inventory of other, less valuable items as well.
I'm also curious if this has happened to anyone else or what the cause may have been. As I said, I had flown just fine for about 15k blocks, so this was a really strange occurrence.
Thanks, and I hope your flights go better than mine. XD