Wildfly uses inifinispan as default jcache implementation. We monitoring our application with javamelody. Javamelody expects to find the cache statistics under 'javax.cache:type=CacheStatistics' as defined by the spec.
So if inifispan is used as jcache provider it must publish its statistic under javax.cache:type=CacheStatistics.
Not sure if the failure is in how wildfly integrates inifinispan or in the infinispan-jcache module.
Also see: Missing cache statistics