https://bugs.launchpad.net/neutron/+bug/1861442 QOS minimum bandwidth rejection of non-physnet network and updates should be driver specific This was discussed in the drivers meeting. The short-term plan is move where validation is done, then there is likely an RFE to tackle once this fixed.
https://bugs.launchpad.net/neutron/+bug/1861496 All ports of server instance are open even no security group does allow this This one is worth a look as it involves security groups potentially not filtering things as expressed by the user. I asked a follow-up question in launchpad, others should chime in.
https://bugs.launchpad.net/neutron/+bug/1861502 [OVN] Mechanism driver - failing to recreate floating IP Some errors related to the OVN ML2 driver are being observed in the gate "TypeError: create_floatingip() missing 1 required positional argument: 'floatingip'"