When you get out of a bed and you then open a shulker box north or west of you, you get lifted into the air and then take fall damage.
Walking to the same coordinates does not cause this behaviour, but teleporting to them does.
MC-157372
Shulker box fall damage after waking from bed
Resolved
Duplicate
0
Thanks for your report! We have another ticket about this as well: MC-158640. It's a little bit newer, but has more details. Therefore I've resolved your ticket as a duplicate of it. We will continue to track the issue there. Feel free to add a vote to the new ticket, or add any extra information to it, if you have any!