Setting Sheet Thickness Defaults to .500

I was trying to cut a sheet that has a thickness of 0.93" and is none PG. The GF App would not take this value and would instantly reset to 0.500" If I used a value of 0.125" or another over 0.1 it would take it no problem. Yesterday I was cutting acrylic at 0.065 all day long. What is going on?? I should be able to cut whatever thickness that I input.