In any case where a notice is provided for in this article, if the court finds for any reason that due notice was not given, the court shall not thereby lose jurisdiction, and the proceeding in question shall not thereby be void or be abated; but the court, in that case, shall order due notice to be given and shall continue the hearing until such time as notice has been properly given, and thereupon it shall proceed as though notice had been properly given in the first instance.