Docu is not clear about galera cluster conflicts

During the last trainings a few questions popped up which were not be answered by the documentation:

• If a conflicting transaction (wsrep_retry_autocommit) is happening, is one of the counters wsrep_local_bf_aborts and wsrep_local_cert_failures increased or not?
• If yes: Which one?
• If no: Feature request: Counter for how many retries we had since server restart.

https://galeracluster.com/library/documentation/galera-status-variables.html#wsrep-local-bf-aborts
https://galeracluster.com/library/documentation/galera-status-variables.html#wsrep-local-cert-failures
https://galeracluster.com/library/documentation/mysql-wsrep-options.html#wsrep-retry-autocommit
https://mariadb.com/kb/en/galera-cluster-system-variables/#wsrep_retry_autocommit
https://mariadb.com/kb/en/galera-cluster-status-variables/#wsrep_local_cert_failures
https://mariadb.com/kb/en/galera-cluster-status-variables/#wsrep_local_bf_aborts