Serving As A Placeholder
Producers of Saved by the Bell only added Tori Scott while Tiffani-Amber Thiessen and Elizabeth Berkley were having their contracts settled. That’s why their characters weren’t present for a good chunk of the fourth season and why Leanna’s character Tori was there in their place. Although she was there for a short time, Leanna probably didn’t mind as much because at the same time, she was studying at UCLA.
After Saved by the Bell, she only had two other acting credits before she quit acting for good after she realized where her true interests in the entertainment industry were.