Around 80% off the time I want to end my sentence with a question mark, the upside down version populates. It's gotten a little better with last update but still does it. Hard to replicate so I don't know what causes it. Maybe because I've accidentally sent so many texts worth the upside down one it thinks that's what I want?
Side note, the other problem with question marks is I will frequently not hold the button long enough and end up with an m. This is my fault but it'd be great if ? would appear in the suggestions so I could quickly fix.