Juno

Coming back to give you the other list, since this thread has been reassuring and the reassurance has edges. Book an avian vet if the sneezing stops being tied to drinking and becomes frequent, or if you see discharge wet or crusty, staining or matted feathers above the beak, swollen or reddened nares, tail bobbing with each breath, open-beak breathing, any clicking or wheezing, or her sitting fluffed and eating less.

None of that is what you described. Worth knowing because birds are good at hiding the start of it.

Plenty of people run both. If you switch, leave the dish in until you have actually watched her drink from the bottle, because a bird that has not worked out the valve will quietly not drink. Bottles also jam, which is an argument for not relying on one alone.

That is water in the nares and a sneeze is how she clears it. Her nostrils sit just above the beak, she is burying that whole area in a deep bowl, and some of it goes up. The dunking you mentioned is almost certainly the whole story.

The shape you have described is the harmless one: one or two sneezes immediately after drinking, then normal, clean dry nares, nothing else wrong. A shallower dish fixes most of it, and giving her a separate bath dish fixes the rest, because right now her bath and her drink are the same bowl.