I wasn't sure why Devenny was subbed and not Kamada. Surely a young player like that would play the 90 pretty easily. And ultimately Kamada was sent off not long afterwards. If I'm going to criticise Glasner it's for this firstly. Surely he can see that.
Just to help you out on this one, the coach decided to withdraw him from the field of play so he could receive the deserved approbation and extolment his outing warranted and so he can carry it forward into the international break.
Further, I believe his proud parents were supporting within the Selhurst Park stadia today and such a gesture is rather commonplace in all levels of sport.