Internet is not working once connected to the VPN in archer ax50. AX 50

I have 2 ax50 both of them having the same issue. I tried changing the settings like disabled antivirus and firewall. Disabled all ALG except IPsec. Its connected but not working. When i enable the PPTP its not working. Even if its working with IPSec only few minutes it will work and then disconnect internet from the device. And its completely working with HUAWEI and D-link routers. Also with Archer C60. 
 

is there any solution to fix this please reply on this dear experts. Thanks in advance.