What happened to my document – Byword Review

I have had several lost documents over the past few weeks. Not sure if it's a recent release that has broken thing, if I am doing something wrong, or if this is just the behavior of the app as I am using it more. I have written a long post in ByWord only to discover that it didn't save to iCloud. Coming back to the ByWord app I only see a portion of my document with most of it just gone. This has happened to me several times and I am not sure how to prevent it from happening again. Having been burned I probably won't continue to use this app, which is a shame because it has most of the features I need.
Review by ellinj on Byword.