Hi there

It looks like your LO is getting quite a lot of day sleep, and his day is unbalanced which is likely causing the Long NW. His A times are very short between and before his naps for a 8-9 month old but then his A to BT is too long. This gets LOs into an UT/OT loop

The good news is if you push our his day to be more balanced I think you will see an improvement pretty quickly.
I would try a min of 3hrs before that first nap, so just an extra 15 mins, then cap it at 1.5 hrs. Then after this nap give him another 3 hrs Minimum before the next nap. I would also cap this at 1.5 hrs. (or you can cap the am at 1hr and offer 2 hrs in the pm)
BT should be no more than 4 hrs larger, ideally more like 3.5.
What do you think?
Hugs, long NW suck!
