I looked at your pictures and it is obvious to me that there has been a differential movement in the L-wing portion of the dwelling.
I am assumming that this is on a slab, due to where you are from.
The brick is a veneer and carries no load. A brick veneer requires control joints. At the door location is where one would have been required if they chose to not install one in the intersection of the L-wing corner of the photo.
At the interior corner of the porch, the brick veneer should have been interupted by a control joint and it was not done.
The brick veneer has relieved itself at the weakest link.
If you look at the joint carefully, it has pulled away and settled minutely and that is why the caulk joint is also showing release to the brick.
There is no substantial weight on the brick due to the valley framing, that is on the Main Exterior wall and so is the Dormer.
The beam look design that we see is only a triple or double header that is picking up the shed roof in front of the dormer.
Dead load here is most likely less than 10#.
I would recommend that a Mason Contractor come in and create a control joint and replace the bricks. Provide backer rod and sealant.
I am a little late with my opinion, but hope it helps some in the process.
Happy New Year to You. :)