Last value from one custom class appears in another.

Steps:

1. Add configuration:

               fieldtypes:
                   ezrichtext:
                       classes:
                           paragraph:
                               choices: [ regular, special, tip_box, warning_box ]
                               default_value: regular
                               required: false
                               multiple: false
                           heading2:
                               choices: [ titre1, titre2, titre3 ]
                               default_value: titre1
                               required: false
                               multiple: false
   

2. Create e.g. Folder.
3. Add paragraph and chose custom class.
4. Add heading 2 and start choosing custom class.

Actual result: Custom class last value from paragraph is displayed.
Expected result: Custom class default value from heading 2 is displayed.