In onChange event sc_field_readonly on/off for field type Select no work

sc_field_readonly does not work in an Editable Grid or Editable Grid View form, for Select type fields (Combo box).
However, in the macros that appear on the right in the examples tab, if it is enabled (green).
** In fact if it works for fields that are NOT type Select (Combo box) in this type of forms **.
I have had to make a detail grid to select / insert from it, and a single record form appears to act on it, because in this type of form it works.
The pity is that the Editable Grid was a Detail Form and the user is forced to see and register the
records of detail in this unusual way.
If there is a problem with the fields type Select (combo box) to make them read-only
In the forms Editable Grid or Grid Editable View, let them know in the documentation, or if it is a Bug see if they can fix it.
Version: 9.4.031
Thank you

well is it or is it not a bug?
Is it going to be corrected?
Has anyone encountered this problem?
It is very easy to test in a form editable grid, two fields type Select. In the onchage event of field_1 do: sc_field_readonly ({field_2}, ‘on’);
It will not be read-only, SAFE! scriptcase says yes. ??? Although it says so in the documentation, not here.