I was doing a post flight inspection of my spark today, and I noticed a slight crack on the trailing end of the prop close to the root. See attached pic. I think this happened as a result of a minor crash I had indoors when I first bought it. I’m surprised I didn’t notice it sooner. I’m worried the reason I missed it is because it wasn’t there previously, and the crack has propagated after 4 or 5 flights. Should I switch it out? I would hate to waste a prop like that, but it’s a no brainer if I am looking at a complete failure after a few flights.