Search field depends on the source

Take a look at the screenshots after clicking on the grey buttons of find all on cds and find all on indico. The field of user changes, from Pablo Saiz to person:'Pablo Saiz'. With the latter, if then we change the source to other cases, we get strange behaviour: for cds, no results; for zenodo , a 500.

The UI should not change when the indico source is selected. The part of prefixing the person: should be done in a transparent way for the user.