Prop shaft keyway was in question if prop slipped - 2020

There was some question as to whether our prop 
had slipped down the keyway towards the end of the shaft? 

January 2020 - We are currently anchored in Tenacatita Mexico

 As far as I can tell the prop does not appear to have slipped. The key is flush to the end of the prop and if it slipped, I think it would have come off completely. Last time we took off the prop to have it re'pitched it needed a wheel puller. Also, there is nothing holding it on so if it slipped, it would slip right off?