If the crop did not get empty during the night, and is that full now, she probably does have a problem of some sort.
I see that someone else already tagged a few people that know more than me about crop issues, so I'll let them be the ones to give advice.
I would check the crop again early tomorrow morning, maybe just before sunup so the hen has not started to eat yet.
The normal, healthy pattern is for a chicken to wake up with an empty crop, then have a partly-full crop during most of the day, then stuff the crop entirely full in the evening...