I figured out why Sophia suddenly didn't like bath time. Since we moved her to the regular bathtub for baths, I've been using the incline seat so she can lie down. She's really been fighting to stay sitting up, so I let her. Viola. Issue fixed. She is back to loving it, and loves playing with her duckie and other bath toys. The new problem now is that her little bum slides all over the place, and it's a bit of a work-out for me to make sure she keeps her head above water! So far, she hasn't thought twice about face-planting in the water, if it means she can get her toys that are constantly floating away. Looks like I need to invest in a slide-proof tub liner.
One of my fave pics. Dan won't let me put it on Facebook:(