So here's a concept:
If your breaker were to actually TRIP, and you found the downstream problem and corrected it, would you then be afraid to re-energize that breaker because "in might not turn on"? Wouldn't you want to KNOW if it was OK or not? If so, then wouldn't it make sense to learn that during a SCHEDULED shutdown like what you are about to do?
So to that point, if it DOESN'T reset, then what are the consequences? You have to replace it? Wouldn't you rather have to do that NOW when you knew in advance that you have to be shut down, as opposed finding out when your hair is on fire from managers screaming at you to re-energize after a trip?
I would call around in advance to see where you can find a replacement in a hurry if there is a problem, just to be prepared. You don't necessarily have to buy it (although the concept of "critical spares" comes to mind if this is such a big problem). Then you can look like a hero if it fails to reset and you can tell your boss "Yeah, that can happen, but XYZ Supply has one on the shelf, I can get it here tomorrow."