Consuming the Gifts is traditionally the deacon's duty. However, I have a friend who is a deacon with celiac disease. HE stays after to clean up the altar after the liturgy but does not consume.
Is this practice normal?
P.S. Does the priest consume if there is not other deacon, in this case?
I am wondering how he receives communion at all. I would imagine the disease is not bad enough to where he couldn't finish the chalice. Also i'd wager a guess that the priest knows about his condition & out of economy & pastoral care for his deacon they have an arrangement such as the one you described. I would be willing to bet the bishop knows about it too. Economy does not the rule make (according to yoda)