I'm having a problem with my smart phone when i connect to Wi-Fi?

Hi, I will make this short so i don't waste any ones time, When i connect with my lenovo tab 2014 to Wi-Fi all the apps that am running, Google chroms. A game w/e it is like hayday for example all shuts down not totally but i can open them again from multi tabs screen. But some how once i open Wi-Fi any type of app that i'm running just shuts down or restart by it self. I tested it alot, i scanned the tab with avast 2014 and came out with zero viruses. So any solution please?