Looking at the timeline and their behaviour it seems to me that something happened with the boys on Halloween weekend when they were all pissed.
They had the party, the next day they were acting weird having a pub lunch, then they were back at Hannah’s unannounced in the evening. Next thing Rach is on her stories shouting about trolls, the boys are grounded etc, phones gone. Samantha is having a wobble on her Instagram (possibly been contacted by the services.) They steam off with Hannah (who only ever appears in a crisis or for a party.) Jo is at home with Wibble, no mention of the other kids apart from Edie.
Then they come back, Rach is love bombing everyone, her Mum is called in. Issac is still missing. She’s attached to Seb like a magnet. She’s trying to prop up Sloshy as the worlds best Dad. They get the no further action call yesterday and it’s back to business as usual last night or camera in Sebs face and Josh being a bellend with possible special needs.
Observational theory only and one day I may write the script