With bubble tails disabled, there's still extra space between the user avatar and the message in the timeline. My guess is that this space is used for the tail but just becomes blank when tails are off.
My proposition is to extend the bubble to the left in this case as it's just space not being used that can be utilized for showing more text of a bubble otherwise.
With a tail the UI elements look more aligned with each other.
With bubble tails disabled, there's still extra space between the user avatar and the message in the timeline. My guess is that this space is used for the tail but just becomes blank when tails are off.
My proposition is to extend the bubble to the left in this case as it's just space not being used that can be utilized for showing more text of a bubble otherwise.