I've had a little over 10 flights, no more than 100ft, and for some reason it doesn't always record in my flight log. Am I not doing something preflight? Some flights will get recorded in my flight log and some won't. Weird. Anyone know why this is happening?

I've had a little over 10 flights, no more than 100ft, and for some reason it doesn't always record in my flight log. Am I not doing something preflight? Some flights will get recorded in my flight log and some won't. Weird. Anyone know why this is happening?