Hamster Behavior

Hi! its my first time owning a syrian hamster as i have had 3 dwarfs and 1 robo previously. my hammy is about 1.5months old but i noticed that she keeps digging in her sand bath even with all the bedding enrichments and hideouts i have prepared for her. she constantly digs in one corner till it hits plastic. i also noticed that shes tamed (able to hand feed, touch, etc) but gets very skittish about it in general. should i be concerned?