Constantly freezes and crashes

Ive been using IA writer as my main tool for writing down ideas for all my projects for a long time. I use iCloud library. Recently the app started freezing all the time, it stops responding now and then and it crashes sometimes. I dont know what happened, but I cant rely on it anymore, its not a fast text editor — its an app that takes forever to set going to start writing.

Agalor about iA Writer, v3.1.3