Some Apps with update status not auto updating


Hi, I recently noticed that some of the loaded apps on my Neo x8 h + indicate needing an update. After clcking on the update function nothing happens. I tried on another off brand TV box and the update works as pops up an update box and initiates the update.
I am able to bypass the problem on my Neo X8 h + by going back to the source and downloading the APK for update manually. I am wondering if there is something that I need to turn on or is this just a flaw in the Lollipop OS?