I think they’ve done it to try stop him waking up and in turn waking them up. I know my baby wakes herself up sometimes with her arms, hitting herself in the face or squirming around and then I have to help her go back to sleep, so
I bet that’s why. Pure selfishness, it’s a baby - chances are unfortunately you are going to be woken up a few times, deal with it
As I’ve mentioned previously, it’s not like either of them have to get up early and go to work all day like many other parents who don’t put all this
tit in a crib to keep them asleep!!