Do not add too much water in Sabudana while soaking, otherwise it will lose their shape or break and it will not come out like pearls.
If there is water moisture in soaked Sabudana, drain it and spread it over kitchen towel for 20-25 mins.
Do not overcook Sabudana after mixing in cooked potatoes mixture, else it will become sticky Sabudana after mixing in cooked potatoes mixture, else it will become sticky.