Dealing with frustration is part of this job. Also this is trivially solved through checking on the person twice a day and doing call reviews, thus making it a

Dealing with frustration is part of this job. Also this is trivially solved through checking on the person twice a day and doing call reviews, thus making it at most a few hours. Actually, this is a regular part of successful remote team building. Meanwhile making the junior approach unannounced is counterproductive. I for one would rather have my interruptions at least scheduled if they can't be avoided.