Hi my 8.5 month old has been in a pretty decent nap routine of 2 naps per day. However in the last week she has suddenly started taking 30-40 minutes to fall asleep when previously she drifted straight off. She isn't generally upset, she just babbles to herself and crawls around the cot. Nighttime sleep has generally stayed not too bad aside from one night this week which was all over the place.
She is clearly too young to drop a nap so should I push out awake windows? She usually stays awake for just under 3 hours for first nap then just over 3 hours for 2nd nap and bed. I have the Huckleberry app and have been following the suggested sleep times which up until the last week has been working really well! 
Any ideas?