Last week (week 26, from 23 june) I was the Neutron bug deputy, please check the report for that week.
* Unassigned:
** https://bugs.launchpad.net/neutron/+bug/2115411 ([ovn-octavia-provider] Exception observe when there no IP available for VIP ): TL;DR: shall we throw http500 or 409 when there's no available IP.