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Solution
If it is delayed (as in taking a while to take effect/change) then you should look into how much you have running on the device at the time this occurs. The more resources being used, the longer it can take for things to work.

In such a case you need to clean out how much you have running. I would also suggest rebooting the device before using it, as well as turning off apps you aren't actually using at the time. Just exiting an app, without closing it, won't stop it from using your resources.
If it is delayed (as in taking a while to take effect/change) then you should look into how much you have running on the device at the time this occurs. The more resources being used, the longer it can take for things to work.

In such a case you need to clean out how much you have running. I would also suggest rebooting the device before using it, as well as turning off apps you aren't actually using at the time. Just exiting an app, without closing it, won't stop it from using your resources.
 
Solution