Thanks for bringing that up; I'm facing what I believe is the same issue. I thought this was also why Cisco recommends a dedicated L3 interface between two switches in a VPC pair. I'm thinking I should be trying to force all my OSPF adjacencies acros...
Is Cisco planning to address this obvious shortcoming anytime soon? https://supportforums.cisco.com/discussion/12456891/asa-5506-x-switchports shows a year's worth of promises that have so far gone unfulfilled.