Unpredictable nap lengths at 6mon
Baby was sleep trained for night sleep at 5 months and she's doing great! Sometimes wakes for 1 feed after about 8 hours but recently has been sleeping through the night for about 10.5/11 hours!
About 2 weeks after night sleep, we nap trained and she's able to fall asleep independently. The problem is the duration. There are some days she can do 1.5 hours or so but last few days it's been constant 30-40 minute naps. Currently on a 3 nap schedule with 8pm bedtime and 7am wake up and ~10.5 hours awake. 2.5/2.5/2.5/3.
She seems to be able to do 3+ hour WWs comfortably and we tried to switch to 2 naps but with the 30 minute wake ups, that doesn't work for her schedule.
Is this just age-related or a schedule issue?