Just got back from my garden and found the same thing with only 1 of my Garden Leader Monster plants. I have 3 other GLMonsters plus 28 other various heirloom tomato plants. Two lower trusses were affected and both were hollow when cut near the main stem. There is also black dashed lines running up the truss if you can zoom in to see them. The first two pics are the first truss and the last is the second truss. Doesn't look like Early or Late Blight and doesn't look like the symptoms I see as V Wilt. You can tell by the leaves that the nutrients are being choked from them though.