Affected content label has unexpected behavior

When the user made a search and on the result page clicks on "Affected content", the first search result checkbox toggles. This seems a bit strange, is this the intended behavior, or is something broken?
Tested on version 8.2.2 and on z3cform branch.

Reproduce the search and result-page interaction described in the issue, then locate the "Affected content" control and the first result checkbox handling. Confirm whether the toggle is intended; completion depends on an agreed expected behavior and a regression check for that interaction.

Written by the indexing model from the issue text.