SwiftKey, a popular keyboard app, has suspended a syncing feature that may have leaked users’ emails to strangers.

The problem has been popping up through the app’s prediction bar. A few users on Reddit have noticed that it’s been offering strange suggestions — including emails they’ve never seen and foreign language terms they’ve never used.

“And now, I’m getting someone else’s German predictions,” wrote one user, who recently rooted a Samsung Galaxy S6 phone. “I have never typed German in my entire life.”

The problem might be related to how SwiftKey collects data on the words and phrases users type. That data is then analyzed and used to predict the customer’s typing habits, including what emails they tend to enter — only in this case those predictions are possibly being shared to others.  

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