This is a regression.

Only Simple State and Submachine State element name is renamed when renaming the
selected transition in the element compartment.

Repro steps:
- create a state diagram
- create Simple State or Submachine State element in the diagram
- create a few different transitions in the element
- while the element is selected, use Shift-Left or Shift-Right arrow to traverse
 to one of the transition. Using the mouse to select the transition can be done
here too but do not double click to select in the edit mode.
- while the transition is selected, start typing in the transition name
Return: The element name is being edited instead of the selected transition

Workaround: when the transition is selected, press Enter to get in the edit mode