Flywheel Axle Bent

So I was running our flywheel earlier today and as I shot a ball I heard a sudden grinding sound and turned off the flywheel to find that the axle had bent. I wasn’t able to get a good look when it happened, does anyone know what could cause this? We’re running our flywheel on 1800 rpm with two v5 motors right now.

Axle isn’t stabilized, probably. Either that or you need to work on your compression. But pics would help

High strength shaft would not bend.