Am sure you're not ignoring her.
You're trying to figure out what's wrong, because you've recognised this is a departure from "normal." You've detected that when cats cry, it's almost always either a kitten response to a parent, or their attempt to let us know they have a want or a need that isn't being met, and with cats, that basically amounts to the same thing.
They have no concept of inappropriate. They rely heavily on us to have their needs met.
Often losing their sense of hearing is massively scary to a creature that relies on heightened senses in a way we don't appreciate. When Paddy went deaf, he would cry for us in the night. As he struggled to mount the stairs, we would get up, pick him up and carry him to bed with us. We put a litter tray in our room too. I would sing to him, and rest my throat on the back of his neck, which would make him purr and calm him down. It will take some work to discover what Bubz needs are, but well done for realising she's unsettled.