Moved our 2 year old into a big boy bed during lockdown. He’s always been a great sleeper before but he obviously realised he could get out of bed and did so a lot to begin with. We have now got a problem where he wakes up at 4am and he shouts/screams and cries. He doesn’t respond to being shouted at, he doesn’t respond to being shown love and taken back to bed every time. If left to cry he will cry until 7am. We have a gate on his door and a gro clock but every night is the same. Anyone else had this, what do we try next.