在更改JSON响应的按钮可见性时滞后

On successful JSON request, I wish to change the visibility of certain buttons that I have in my interface. However, when I do handle it in the manner as described below, I encounter tremendous lag for some reason. The print statement goes through in each of the state calls, but the visibility of the buttons themselves don't change for like even up to 30 seconds.On successful JSON request, I wish to change th