Try this yourself. I mean actually try it, because you are probably used to doing it in a way that works and will respond with that procedure.
Add a component. Go to the entity box “definition” field. Type a name for the component.
On my Mac, the “enter” key highlights the whole name in the field. (This is the trap that gets me.)
On my Mac, the “tab” key (as Wo3Dan proposed) does nothing.
Grabbing the mouse and clicking back on the drawing does change the focus as expected.