Issue with buttons

[srijan-sinha]

There is an issue with the app as a whole. Whenever a button is pressed there is a slight lag, so in the meantime if we press the button twice then the next screen is loaded twice to the stack. I have tried this for the 'QR CODE' button but this maybe a general problem for various things.

[DivyanshuSaxena]

The solution is: All API calls must be made at the Widget which displays the data and enclose that Widget in AsyncBuilder/PullRefresh Widget