Why some of the android apps doesn't work on Wifi Why some of my android apps doesn't work on Wifi when all other apps work fine.

And these apps work on Mobile Data but not on my Home wifi.


  These apps work when I switch 'Airplane Mode - On' and turn On my Wifi


Tried: 


Have tried searching this on XDA forum 
Tried Static IP instead of DHCP 
Setting my time and date manually
Checked my App Data Usage (for specific app) - 1.66Mb over Wifi &amp; 11.02Mb over Mobile data
Tried my Wifi password twice, tried rebooting my phone twice.
Tried App Restrictions &amp; Storage Permissions
Turned Power Saving Mode - Off


FYI: 

My app is in Testing phase - Loading Bitmaps

My Phone is Coolpad3600I ver: 6.0.1

Couldn't understand this weird problem. Need help.
After a lot of research yesterday, I found my project was lacking few crucial steps for loading bitmaps


Caching of bitmaps was not properly implemented because of which I was getting Out of Memory errors
I was also getting Android Support Disable plugin error after every few minutes
Android Profile Analyzer was showing lot of irrelevant threads which was consuming memory


Since, I didn't have much time to look in every file of my code. I modified my sluggish code and imported Android Bitmap Sample code from the library.

Most of the common errors of Wifi, caching of bitmaps &amp; Disable Plugin errors were taken care.