Steps to reproduce:
Open or create a patient record and go to the "Clinical symptoms..." section
In the "Quick phenotype search" box type a query, e.g. 'fever'
" appears in the Current selection panel
In the quick search box type 'fever' again
Select [Y] for Fever
Result: "Fever" appears in the Current selection panel *in addition to "
The expected behavior is: "Fever" replaces "NO Fever".