Save File on Nintendo Switch currently 1.4GB. Won't shrink when removing worlds.

The savefile is currently 1.4GB. I have only got 2 worlds in my game. They are both less than 100MB in size according to the ingame menu. I used to have a lot of worlds (had to test some things to help a dev pinpoint a different problem.) But upon removing those worlds my save file stays 1.4 GB. It's very annoying to have to backup 1.4GB everytime I close the game. It drains my switch battery in sleep mode.