Oh don't worry too much, from what I've heard, it's actually quite common for babies to go quiet on the babbling when they're teething or suddenly picking up a bunch of new physical skills at the same time, like your girl flipping and grabbing her feet! My neighbour noticed the same thing with her baby around that age, and her paediatrician told her that when babies are pouring all their energy into new milestones, the babbling can take a little backseat for a while before it comes back again. Honestly I'll be real with you, it can feel a bit unsettling when something they were doing just stops, but the drooling and mouthing everything is such a classic teething sign, and that discomfort alone can make them less chatty. Most mums I've spoken to said the babbling returned once the teething settled down a little. That said, since every baby is different, it's still worth mentioning it at your next PD visit just so you have peace of mind from someone who can actually assess her properly!
Hi mum, I went through this worry also when my baby suddenly became quieter with babbling around that age. Sometimes it can happen because baby is focusing more on new physical skills like rolling, grabbing feet, or trying to crawl, so their attention shifts and vocalising reduces a bit for a short while. As long as baby is still responsive, making sounds sometimes, and meeting other milestones like movement and eye contact, it’s usually not something to worry too much about. But if you notice she becomes very quiet for a long time or loses other skills as well, then better to check with PD just for peace of mind.