1
I didn't particularly see a reason why you shouldn't be able to play against yourself in sandbox.
1
Isn't the whole point of sandbox to try new strategies? how can you try new strategies against the same strategy/players?

Anyway I reported 'cause I thought it was a but somehow, but if it was intended then it doesn't matter at all!
1
Yeah, it's cool you reported it. Feedback and discussion is always welcome :)