Stalls in a conventional airplane are easy to avoid, and easy to resolve. Stalls in a canard or tandem-wing aircraft don't' happen, if the airplane is designed properly and flown within the designated CG envelope. Inverted stalls in a canard/tandem-wing airplane would be a nasty, nasty, NASTY thing, where the airplane tries to swap ends in the pitch axis. Fortunately, if inverted in a canard/tandem-wing aircraft, you probably wouldn't have enough pitch control authority to cause a stall in the first place, under all but the most extraordinary circumstances. In short, it's nothing you have to worry about, unless you really are absolutely determined to make it happen. Keep the right side down and you'll never have any trouble.