From logstash queries http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22IpTablesApplyException%3A%20IPTables%20Rules%20did%20not%20converge.%5C%22 and http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%20%5C%22bug%201896735%5C%22 it seems that this issue happens sometimes also on Ubuntu Bionic nodes. But is much more frequent on Focal (and linuxbridge job)
From logstash queries http:// logstash. openstack. org/#dashboard/ file/logstash. json?query= message% 3A%5C%22IpTable sApplyException %3A%20IPTables% 20Rules% 20did%20not% 20converge. %5C%22 and http:// logstash. openstack. org/#dashboard/ file/logstash. json?query= message% 3A%20%5C% 22bug%201896735 %5C%22 it seems that this issue happens sometimes also on Ubuntu Bionic nodes. But is much more frequent on Focal (and linuxbridge job)