Drop Down in Calculated Fields does not drop down and pasting does not paste multiple lines. (4225623)

Open the calculated field window in Query builder. Create/select a name for the calculated. Below, click Field Definition drop down to open up as a window. In that window is another drop down at the top. This does not drop down as a window. If attempting to paste a multiple line statement into this field, only the first line is pasted in.

Example:

CASE
          WHEN FROM_TO_ERROR = '1' THEN 'It is 1'
          WHEN FROM_TO_ERROR = '2' THEN 'It is 2'
          ELSE 'It is something else'
       END

But in the calc field, it only pastes:
CASE

The rest of the statment does not paste.