Internet disconnecting issue with VPN in Android TV

Messages
24
Location
India
ISP
BSNL
Some weird issue is happening with me, When I'm using Android TV with VPN sometimes randomly my internet connection drops, like wifi is on but internet won't work, It's like a soft reboot of the router and after few minutes it'll connect to bsnl server.
At that time 192.168 .1. 1 also takes time load like router is not responding.
If my tv is turned off or vpn is turned off in the TV everything works normal.
Please help if anyone knows anything about this issue.
I'm using Syrotech G/EPON ONT/ONU
 

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