My Titanium Backup makes an app-backup once a week in the middle of the night. I leave my phone on flight mode during the night. In the nights when TB does the backup, the keyboard settings change from SwiftKey back to Android-standard.
Does anybody have the same behaviour? Does anybody know why this happens?
No, I have never seen any problem like this, I use MessagEase keyboard and it is still there every Sunday morning (I do scheduled backup the night between Saturday and Sunday) 
Bye!