This STR is for an english keyboard, but the issue happens for other keyboards too. STR: 1. Open the SMS app. 2. Start a new message, put the focus in the message input. 3. Type "Ill" then space, it is autocorrected to "I'll". 4. Press the "backspace" button. => The autocorrection is not canceled. Note this works as expected if we're not at the start of the line.
This is the latest OTA, B2G 2.6, Gecko 47.0a1, BuildID 20160212150237.