I was actually going to ask what the rationale behind this was. I found that because of this, the best strategy was usually to wrap around to distract the block. I personally felt like the game would have worked better without that, although hard to know without trying it.
I felt wrapping added a strategic depth for me to explore and a positive sensation of "outsmarting" the red block.
Could simply be that ignoring the wraparound is the naïve way to provide a direction for the red dot. Navigating a wraparound world is also unintuitive, so the player would be at a disadvantage if the enemy could take advantage.