I have an prototype item in a LLD discovery that receive a text with a external check, then I tried in many ways to create a dependent item to process the information of the prototype item but the items never got created by the LLD.

Then I tried to change the master item as a "normal item" from the template and all the new items got created.

After this I changed the master item inside the Dependent item and now, all the items are created and working with the right master item.

I think that is some sort of bug because if it was not supposed to work, changing the master item from a "normal item" to a "prototype item" would remove all the items created  before.