That speech bubble thing seems to be a rare bug that only happens in some projects. I have never been able to reproduce it, so it has been difficult to fix. Could you send me your project with email so I can find the reason for this? (pikkua.games at gmail.com)
Alternatively, try changing some settings in your game, like the room, view or camera size and aspect ratio to see if it has any effect. If you manage to figure it out, let me know how.
Edit: The next update (2.9.0) will have a fix for the rare speech bubble bug.