It looks that each THD entering to pre-commit stage has thd->wsrep_PA_safe set to false, done in Query_log_event constructor when adding BEGIN Query_log_event into IO cache. This in turn disables PA for transactions, seen as wsrep_cert_deps_distance 1.000000 in wsrep status.
It looks that each THD entering to pre-commit stage has thd->wsrep_PA_safe set to false, done in Query_log_event constructor when adding BEGIN Query_log_event into IO cache. This in turn disables PA for transactions, seen as wsrep_cert_ deps_distance 1.000000 in wsrep status.