I believe that this fix does remove the "Element with role attribute has required states and properties" flag in a11y checkers, but should the id associated with aria-controls on the combobox instead be attached tot he corresponding listbox element? This MDN doc seems to suggest that's the correct use of aria-controls in the case of combobox. So in the case of this combobox, the id associated with the aria-controls would be select2-edit-field-topic-target-id-results instead of select2-edit-field-topic-target-id-container.