This worked for us as well. We are not seeing the performance issues others have said they seen. Created the Static NAt for our HA pairs VIP which is the source IP for the Meraki AutoVPN. We were able to get all green across the Meraki dashboard and our tunnels came up. Thank you for all the digging you did. I have been talking with Palo and Meraki and didn't get anywhere. Reworded my google search and thanks to this article ours are working.
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