Hello,
Other than this one thread I can't find any solution or details on this issue - https://social.technet.microsoft.com/Forums/en-US/ea64c206-097c-43d5-9bfd-612c2a5d5b6c/hyperv-replica-machine-sitting-at-quotmodifying-scheduledquot-state-but-working-fine?forum=winserverhyperv