Text slicer : should be possible to type multiple values without using my mouse

In a text slicer, when you add a text to the existing list of patterns, you  validate each new entry with the Enter Key. Your text is then added as a new box at the end of the list.

You want to go on with the next pattern (that's where text slicer shines) but your keystrokes are lost. The focus has left the slicer.

A workaround os to use ALT-TAB, it will bring your focus back to the beginning of the text slicer, then type "End" to type next pattern at the end of the list.

Not very intuitive.

Why not prevent the focus from leaving the slicer when user types Enter key ?

Efficient people copy and paste few values without leaving their keyboard.