I think sand is prolly the worse trap that befalls us bike riders....
Unless you are driving on a road that has obvious drift problems, its easy to get complacent in good riding conditions.
I know my awareness is heightened, on rainy and snowy/icy days, that I ride, not stiff to where I over react, just more focused.
I remember reading a bike riding advice book when I first started riding, it said to be extra careful on roads that have no curbs....
Which is about all the roads I ride on, haha, as folks have a tendency to "cut the corners" and it brings sand/dirt up a few feet from the road edge....
Its a BIG problem here, and one I take into consideration always. I don't like riding toward the center on a blind turn, as jerks often coming the other way cheat into my lane, so you gotta be aware at all times the risk.... just saying.
Look on the bright side, you have a good excuse to work on your bike some more!