This woman I work with will not stop snapping and chewing gum loudly...Does this annoy anyone else?

I work as a teacher's aide at a elementary school. One of the teachers I work with snaps and chews her gum VERY loudly. She shares a room with another teacher and myself and will snap and pop bubbles as well as chew with her mouth open while the other teacher has a class going on. Even when the kids are taking a test. I think it is extremely gross and distracting and honestly just plain rude. The other teacher doesn't say anything about it and doesn't seem to notice like I do. Has anyone else had a problem like this? What did you do if anything? Am I crazy for thinking this is disgusting behavior?