Soem babies just do this. DD is exactly the same - 30-40 minutes durin ghe day, 1-2 hours at a time at night. Right now she's teethign so it's worse, in the past she did sometimes do 3-5 hour stretches at night sometimes.
Sometimes they just get over it. DD has done a few 1.5 hours sleeps in the day recently.
My DS was also a catnapper. Nothing helped till he dropped to 1 sleep at around 15 months, then suddenly he started sleeping 1.5 hours, then 2, then 3...

If she wants to be iwth you and is done sleeping ten leaving her to cry probably isn't giong to help you much. I'd kjust get her up and try again the next time she's tired.