I have never seen this before at a Mass. After the Communion Rite, the ciboria are placed in the Tabernacle. The priest sits down. I expect that the introduction to the closing prayer is coming. But no, he goes to the Tabernacle, retrieves the Lunette containing the host, retrieves the Monstrance, places the Lunette upon the Altar, incenses the Body of Our Lord, while the usual hymn is sung, then the usual prayers are said, then he blesses everyone with the Monstrance, and then the usual hymn is sung (but abbreviated), he places the :Lunette back in the Tabernacle, and Monstrance to the side, and the the Mass resumes with the closing prayer. There is no Adoration continuing after this Mass.
Is this correct, and if so, what its liturgical function? Have we not just received the Body and Blood of Our Lord? Some people are even asking “Why not do this at every Mass?”