When a story is locked the Takeover button is located in the same position as the Save & exit button when the story is not locked leading to accidental takeovers when a user with the save and exit muscle memory is moving quickly. We would suggest leaving the Save and Save & exit buttons in place and grayed out and moving the knock and takeover buttons to the left of them where there are no buttons normally.
Brandon Omohundro
We fixed this with a release of Composer 2.0 earlier this year!
Thank you for this submission. We have some work planned later this year to reconsider our locking experience and this is great feedback to help inform that new design.