Suggest a Veterinarian consult or visit it is too difficult to know what is going on from the other side of a computer screen. Something may be very wrong like an infection or heavy metal poisoning. or it could be just got a scare when she was near her bowl and is now avoiding the area. Try some warm cooked sweet potato mashed well with a little ginger. Do call a Vet they have very little resilience when ill and don't show symptoms unless they are in need of help.
I think it has become both for him, attention or a drink as needed. Nikki bird requests "fresh water" with authority several times a day. So being well trained I take his water bowl rinse and refill with fresh water and in Summer he expects ice cubes to be added. Smarty Pants just makes a thick soup in his bowl-eech!
Suns are not Too loud but Nandays can pierce your brain with their sound waves. Living with a big Cockatoo lie a Molluccan or an Umbie is like having a B52 landing in you living room, same decibel levels.
Birdhouse my answer is "magic". No really the Quaker was young enough to still have the feed me response and at the time we had two elderly cockatiels in there as well (large cage). The Tiels died quietly over the next few months both were very old (early 20's). That left the little yellow keet and the Quaker who don't interact much but share the space nicely.