I'm having some issues using apps while connected on wifi.  

It looks like some times apps won't connect on internet through wifi,  they connect very well via data connection but not via wifi.  I have verified this on different wifi networks and providers,  just to be sure it is not my router. 

Is any solution for that?

It is very annoying thinking you spent a lot of money just get troubles 

Thank you in advance 

Aldi