After speaking with Daniel, it appears that the issue is potentially fixed in ovn2.13-20.12.0-24 (1903210). I have provided the acks and the blocker '?' flag and set the target milestone, all so that this BZ can be evaluated as a blocker and potentially be included in 16.1.4. If there is an issue with this please let us know.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Red Hat OpenStack Platform 16.1.5 bug fix and enhancement advisory), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2021:1052
*** Bug 1963064 has been marked as a duplicate of this bug. ***
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days