As announced earlier today, we've rolled out a hotfix to a bug that was causing story events to return the wrong text (and rewards) - it could cause the fail response to be returned as the mission succeed response for example.
We've fixed the bugs that were causing this, but it does mean that save games will again be wiped today. Apologies for the inconvenience, but we felt that it was important to get this fix out sooner rather than later.
FYI we've also added a list of known bugs to the forums: http://steamcommunity.com/app/335830/discussions/0/611701999539489838/