Have you considered she might be a bit under tired? Her naps are lovely but her A times in the earlier part of the day are still pretty short. I wonder if she had some longer awake times I’m the day whether she might sleep more soundly? I’d be tempted to push her gently to at least 3h for each A time, then see if that helps. Development and teeth could also be playing a role though - so if you don’t get any improvement with more awake time then it may just be a case of riding it out for a bit longer x