The weight loss is completely normal and expected. A lot of the weight came from water bound up in the starch reserves, it'll come right back after eating carbs

The weight loss is completely normal and expected. A lot of the weight came from water bound up in the starch reserves, it'll come right back after eating carbs for a few days. Similar weight "loss" would be seen transitioning into a diet with <100g carbs per day but with normal, or even excessive caloric intake.