Android connected to WiFi but no internet issue

Suspected cause for my case:

• Vivo android phone use "randomized MAC address" when connected to WiFi
• My house have main router + mesh router
• I do IP Binding with Mac address
• Combination above caused the issue.

Solution:

1. On android, in respective connected WiFi setting, change Privacy to "Use device MAC" 
   
   
   
   
   
2. Go to router > LAN > DCHP and remove any previous binding with your phone name
3. Off Wifi on phone, go to another router, on wifi on phone, connect to it
4. Fixed

Regards

Matthew