The test AutoIgnoreDomain tests when adding an ignored server group, like this:

https://github.com/luck3y/wildfly-core/blob/6cdd4af55b7723ff943a3743143a6056458f4f56/testsuite/domain/src/test/java/org/jboss/as/test/integration/domain/autoignore/AutoIgnoredResourcesDomainTestCase.java#L495

Also calld the JvmAddHandler. During the JVMH add, the prior add of the server group is not visible in the model and the op fails.

Workaround in JVMAddHandler.populateModel, to attempt to RRFR, and fail silently if the parent is not available, but something prior in the chain is violating the readDomainFromRoot contract, as the server element should be a visible, but uncommitted change in the model.