I would get hurt randomly on multiplayer

Whenever I'm playing Pocket Edition, I would jump up and down under tree and then randomly die. It's would stay that I fell from a high place but I didn't. This only happens when I'm playing in multiplayer and I know it's not my friend because she's not around me when we are playing together, she would be in the house or in the caves. Also when I chop down trees, I would randomly get hurt and lose hearts. I don't know what's going on because I thought this was a big but it was not fixed on 0.13.1. Is there anyway you guys can fix this problem?