Why was John the Baptist not excited at seeing Jesus at Jordan? At  Luke 1: 41  we see:

"When Elizabeth heard Mary’s greeting, the child leaped in her womb..."

We also see at John 1: 29:

"The next day he saw Jesus coming toward him and declared, “Here is the Lamb of God who takes away the sin of the world"

One sees here that the excitement that John the Baptist had  as a yet-to-be- born baby in anticipating the arrival of the Saviour, is rather missing as he sees  Jesus coming towards him to get baptized. One interpretation could be that John had already been aquainted with Jesus as his cousin and it was not the first time that he was meeting Jesus in person . I wish to know how the Catholic Church interprets the apparent lack of excitement and joy in John the Baptist while greeting Jesus at Jordan.
St. Thomas Aquinas refers to Lk. 1:41 when commentating on Jn. 1:29:


  Note that after the conception of Christ, when his mother, the Virgin, went in haste to the mountainous country to visit John’s mother, Elizabeth, that John, still in his mother’s womb and unable to speak, leaped in her womb as though performing a religious dance out of reverence for Christ. And as then, so even now; for when Christ comes to John out of humility, John offers his testimony and reverence and breaks out saying, Look! There is the Lamb of God.


Origen does, too (as quoted in St. Thomas's Catena Aurea on Jn. 1):


  After this testimony, Jesus is seen coming to John, not only persevering in his confession, but also advanced in goodness: as is intimated by the second day. Wherefore it is said, The next day John sees Jesus coming to him. Long before this, the Mother of Jesus, as soon as she had conceived Him, went to see the mother of John then pregnant; and as soon as the sound of Mary’s salutation reached the ears of Elisabeth, John leaped in the womb: but now the Baptist himself after his testimony sees Jesus coming. Men are first prepared by hearing from others, and then see with their own eyes. The example of Mary going to see Elisabeth her interior, and the Son of God going to see the Baptist, should teach us modesty and fervent charity to our inferiors. What place the Savior came from when He came to the Baptist we are not told here; but we find it in Matthew, Then comes Jesus from Galilee to Jordan unto John to be baptized of him.