I think your daughter is telling you that 'something' is up.You mention that she eats very few solids-- do you mean that you are introducing just a few, or that she is only accepting a few, or are you speaking of quantity ( in either introduction or acceptance?) I ask this because some children are really ready for more food earlier, and solids are important. I also wonder if the milk has been offered in a cup while in care, if that would be novel enough to help keep her drinking.
If it were me, I'd offer the milk first, and then solids, and let her eat until she's full or disinterested. Watch what happens at this point. Sometimes, our children are ready for the novelty of solids; all the flavor and texture is quite a contrast to any sort of milk. As long as the solids are fruits and veggies/grains in a pureed form, and as long as her diapers are wet, she'll be getting enough hydration. Water in a cup can be offered too, to augment the milk she'll be getting when she nurses with you.
Sometimes our children have funny ways of telling us they need something different than what we want for them. I do understand your desire to keep the breastmilk up, and she is still enjoying this as part of her bonding with you. However, she may prefer bonding over meals and feeding with her caregivers, and it's important to let that routine happen. She may also have the nutritional need for solids (which is one reason it's often recommended to start them at 6months, as their nutritional needs change) that is coming to the fore. If it were me, as I said, keep offering the milk first, then food, and just see what happens. Ask your caregivers to share their observations, and help them to develop their routine with your little girl. It sounds like she's lucky to have so many people who are all looking out for her!:)