Ipsec IKEV2 site to site Router OS7 /OS6

Hi all,

Has anyone had or is it established if there are known issues between Router OS6 /OS7 with IPsec IKEv2?
I’ve spent all afternoon diagnosing an issue getting a tunnel to establish and in the end it seems to be how the SAs were being handled on each side.
The tunnels would briefly establish and then drop and display “no phase 2”
This is using Router OS 7.8 and V 6.48.6 LTR