I have only had my Flinders Range Scorpion 4 weeks and when I give him some pray he has a tendency to move away.
He seems to study his pray first and then strike when the time is right.
Just let him go for a while and see what happens, they seem to be natural predators and mine is only 6 to 8 weeks old.
He happily takes down pray the same size as his body. I prefer to feed something smaller but my crickets are getting bigger. Will have to let them go or something and get some more small ones.
Not sure ware he stores it all when he eats it
I feed my scorpion every 3 days.
Hope that helps