Thank you for posting and welcome
Yes it is possible that she might suffer from digestive problems if it is only recently that she started. It will also depend on the daily quantity she consumes daily. Since her stomach might not be use to uncooked rice, indigestion
will be her first problem, then she might suffer from constipation
and subsequently (severe complications) such as intestinal occlusion which might require a laparotomic surgery to free the intestines. It is not yet too late for her, since she is not yet manifesting digestive symptoms but subsequently it might be a problem. Depending on the hygienic condition of the rice, she might also suffer from intestinal infections.
Might advice is for her to stop as soon as she can, and visit a gastroenterologist or visceral surgeon to evaluate her GIT.
Hope this helps and wish you guys the best