Question About Bumpers (R19, Specifically)

[m1tche11d]

I was checking up on bumper rules, and I had a question about R19 and figure 4-3. Specifically, over Robot Frame Perimeter C, pic attached below.

I was wondering why specifically the bottom right hand side is not legal. There are two "not ok" arrows in that corner, one pointed towards the bottom of the robot and one pointed towards the right side of the robot. It seems to me, based on my interpretation of the bumper rules, that the bumper on the right side should be fine, since the side is fully covered, satisfying the "If a side is shorter than 8 in., the entire side must be protected by BUMPER" rule.