--no-wait
is part of the az CLI itself, not the underlying operation. It tells az CLI to return, even before the underlying operation is finished. So your storage account failover process is probably still running - and might take a bit to complete. Before that isn't done, you cannot do another update operation on it.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…