MariaDB code fragment editor deletes code

Pycharm Pro 2018.3.

Default Pycharm SQL dialect is MariaDB.

New blank project.

Enter 

sql_text = 'select * from workshop.foo'

Alt + Enter - Select Edit MariaDB Fragment
Code appears in new window.
Reformat code - line break appears and keywords uppercased as desired in the fragment window.
Top window now looks like 

sql_text = 'SELECT *

(Just that).
Close the fragment window , code is
sql_text = 'SELECT *

SQL Code Style is defaults plus Keywords and types set to Upper.

Any ideas?