I hate those square d disconnects. At the beach, if you turn it off, alot of times it wont come back on.
Take it out, tap the sides a few times, pop it back in. 50/50 chance it'll catch. I don't switch off those single lever Square D's for that reason unless I really have too then I go to the inside panel and kill it there. They usually have better breakers inside. Junk... but I see the newer ones extend the lever across the whole breaker now, something they should have done in the first place.