Comment 1 for bug 1732445

This bug seems to be referenced in the commit message of that change:

"Such host filtering has some limitations if a dhcp-agent is on a host handled by multiple l2 mechanisms with one mechanism claiming network reachability but not the one handling dhcp-agent ports. Indeed the host is able to reach the network but not dhcp-agent ports! Such limitation will be handled in a follow-up change using host+vif_type filtering."

And the code in filter_hosts_with_segment_access() has this comment:

    This method returns all hosts from candidate_hosts with access to a
    segment according to at least one driver.