Hi there and welcome to BW
Would you consider implementing a dream feed between 10 & 11? That should eliminate hunger as a cause of the wakings, and it might help with that NF too. It is completely normal for babies who previously went longer between feeds or STTN to start needing 1 or 2 feeds. There is also a growth spurt around this time which might be contributing to the wakings.
However, since you feel these wakings are more habitual, you see if one of these methods help
How do I address habitual wakings? (wake-to-sleep and other methods)Hat's off to Dh for sticking it out for 1.5 hours with settling! I honestly would have just fed if it would get her back to sleep:) After you feed her, does she go back to sleep without an issue?
Just one last point -- since these wakings are so random, it might be worth taking a look at your daily routine to see if anything there could be contributing to the problem. You could post it here in EASY format if you would like us to take a look
xx