How long til they went back to STTN?

LO slept ~7-8 hrs from a little past 2 months and we gradually moved bedtime earlier which got her to sleep 10-11 hrs. But at 8 months, she stopped. At 9 months, we usually have 1 longer wakeup (30mins-1hr) and maybe 1-3 pacifier semi-wakeups. She is up for the day earlier by about 40 min-1hr. She also needs us in the room to fall asleep, which she didn't before separation anxiety peaked last month. I thought maybe it was the 9 mo sleep regression a little early...but I don't know, it's been a little over a month.

Is this going to be a "permanent" change? Anybody have any experience?