Ever experienced issues adjusting to new nanny??

So I have a 2yr old and 3yr old and we’ve had the same nanny their whole lives. Recently she had to leave to care for her aging mother, so we had to hire a new nanny. She seemed great at first, and don’t get me wrong—the kids are clothed, fed, clean and safe. All the basics. But I WFH and so I do hear a lot of the struggles throughout the day which NEVER happened before. Also I feel like this nanny just does things differently. It’s hard to explain, but the vibe of our previous nanny was like she was the kids grandma. This is more like, she’s a teacher or something. If that makes sense. My son has been ok for the most part, but my daughter (the 3yr old) has been having a lot of trouble adjusting. Yesterday they got into a huge fight and I went to go check to see why my daughter was sounding hysterical out in the family room. The nanny told me she turned off the tv because my daughter was being “disrespectful” and I asked her what she meant by disrespectful (because of course being disrespectful is not ok, but my daughter isn’t known to be disrespectful), she told me that by disrespectful she meant my daughter was crying and wouldn’t stop to talk to the nanny and that she “needs to properly communicate”. I got kinda pissed at that point because my daughter has had a stomach flu for 2 days now and so, yeah of course she’s crying and can’t communicate because she’s never even had a stomach bug before! I had a convo with the nanny where she essentially deflected every little bit of constructive criticism I tried to give. Blaming it on the kids basically. That bothered me a lot and I almost fired her, but my sanity prevailed and I figured we’ll see how things move forward. Now that was yesterday and today my daughter is acting like she’s afraid of the nanny, won’t let her give her a bath, doesn’t want her to change her to brush her hair or anything. Cries when my husband and I leave (which she had never done in the past). Anyone ever experience something like this? I’m sure it’s a major adjustment, but I also don’t want to just be taken on a ride by my three year old who could be playing us for all I know. I’m giving her the benefit of the doubt since she is sick…thoughts? ! 🙏🏼