Tip toe walking

My 2 and a half year old daughter has been walking since just after her first birthday and in the last few months she has started to walk on her toes mid walk. It started only when she wasn’t wearing shoes and not often. Now it is had developed to more often even with shoes she will do it. I know it can be normal until they are 3 but, I just want to know if anyone else has experienced it with their kid developing the tip toe walk.

I do plan on asking her doctor next month when I take him for his check up. If it progressively gets worse I will definitely talk with her doctor sooner.