The melee is still doing almost no damage in many instances, despite it being said in the patch notes it was fixed

" Fixed an issue that would sometimes cause the Sunbreaker Titan's Mortar Blast to deal little to no damage. "

https://www.youtube.com/watch?v=mZ4IbZ6Z-_Y for video evidence

This is one of the things that makes the subclass so frustrating, and it is even more frustrating that it was not fixed.