Cannot remove the 1px stroke on transparent export?

[FuzzyWobble]

Possible to remove this 1px stroke (that is the key color)?

(sorry for such a horrifying gif)

this.encoder = new GIF({ workers: STICKER_WEB_WORKERS, quality: STICKER_GIF_QUALTIY, workerScript: settings.workersPath + 'gif.worker.js', transparent: STICKER_KEY_COLOR_HEX, delay: 500 });

[FuzzyWobble]

^ this image shows it better