It has not been fixed in 21.7.7 for me.Also I have only enabled suricata on my WAN interface which has no virtual interfaces, so I don't understand why I am impacted. For now disabling suricata has solved the issue.
Did you try rolling back the suricata version to the one before 21.7.6? It works wonderfully for me after a rollback.
Has 21.7.7 solved this problem?