Why were God’s reactions so different in Exodus 4:24-26 and Joshua 5:2 concerning circumcision?

Exodus 4:24 At a lodging place on the way, the Lord met Moses and was about to kill him. 25But Zipporah took a flint knife, cut off her son’s foreskin and touched Moses’ feet with it. “Surely you are a bridegroom of blood to me,” she said...