Hate to say this but maybe if Jake & Sophie would put their phones away and just concentrate completely on the baby for a few days they might find they get to know him and are able to get his issues sorted. Since the boy was born they have been all over the place constantly on Instagram, doing stuff for MTV, doing photo shoots with his photographer friend, out and about with the kid etc etc etc - they haven’t given themselves or the baby time to just chill the fuck out. Like when the baby needs a nappy change, Jake takes time to arse about getting his daft swimming cap & nose peg on, sets up his camera or phone to record and then starts the performance of doing the nappy change - it’s not normal. The poor baby probably doesn’t know what’s going on, with Jake and his million personalities and his fake performances for Instagram every 5 seconds.
I also think that the two of them need to get into some sort of evening/night routine now, there’s no need for them both to be up all night with the baby. Take it in turns, one sleeps with the other sorts the baby and then swap so that both adults can get some rest.