I just tried using this app with one of my friends and I found that editing in real time between two people wasn't working as intended. When someone else wrote

I just tried using this app with one of my friends and I found that editing in real time between two people wasn't working as intended. When someone else wrote text, the text I wrote (in a separate paragraph) would disappear. Is anyone else seeing this? It needs a bit more polish before I could use it for encrypted collaborative editing.