C.M.
He misses you mom and it's a way to say I love you pay attention to only me. Since it's a pattern - when you come home I would dedicate the first 10 minutes in the door to him. You probably don't want to pick him up so get down to the floor and play something special. Tickle him, do a song, patty cake, hokey pokey have it be all about him. If you have to pee - stop at a gas station before you get home. He'll get his fix on you and then you can move onto the rest of the evening. Our kids always save that special behavior - the melt downs, etc for us because they are safest with us and know that we love them. How good he is when you are gone is just proof of what loving and wonderful parents you and your husband are.