Empty "fields" list in "Returns" properties of a NetWebServiceMethod - Bug

[jlavera]

Hi, all.

In version 12.41 and 12.46, I found that when I enter a NetWebServiceMethod, go to Actions, Returns tab, properties button, and "fields" list, there suppose to be the list of selected fields there, but now it is always empty.
Does this happens to you?
If I go to "options" and select the "view table" button to "select" the file again, THEN the list appears again (only if I actually select the file), with the file selection memorized. However, as soon as I "save" everything, the selection seems to be lost again. In fact, I'm getting a field in the API answer that is specifically unselected in the list.
What to do?

Kind regards,
Jorge Lavera