On Wildfly 40 beta when registering Timer using method io.micrometer.core.instrument.Timer.Builder#register(io.micrometer.core.instrument.MeterRegistry, io.micrometer.core.instrument.Tags) there is a warn in log

WFLYMMTREXT0015: MeterRegistry.Config is not supported in a WildFly-managed MeterRegistry.

MeterRegistry is injected using @Inject and it`s a instance of org.wildfly.extension.micrometer.registry.ApplicationRegistry

This warning is caused by register method  calling  org.wildfly.extension.micrometer.registry.ApplicationRegistry#config when pauseDetector not set to Builder