my friend and me died as soon as we came back from the end to fall damage multiple times

We came back after a while in the end maybe 30 to 40 minutes. We went through the portal back from the end and then died from fall damage somehow. We lost all of our loot instantly and we looked around in case we just glitched but found nothing. We then tested if what would happen if we went through the portal again and we died again because of fall damage. The only thing that remained was experience points.