I was recently doing a building job on another player's island on Skyblock. I was trusted on the island, therefore able to take fall damage. I fell from the top part of the island to the bottom. During the fall, I attempted to engage my elytra and safely glide down, but they did not deploy and I continued to fall. However, when I went back to find my items, they had disappeared. I immediately scrolled back up in chat, but there was no notification that said "Items clearing in..." I can confirm that nobody else on the island picked up my items and they did not fall of the edge of the platform. I lost about 2 million dollars worth of armor and an elytra.