Wi-Fi stops working until disconnected and reconnected

So the issue is with my ipad 7th gen. Its started around 2 weeks back. wifi stops working all of a sudden, and i need to either turn wifi off and agin reconnect to the wifi. Or turn on aeroplane mode and then turn it off and reconnect to the wifi . Things I have tried :

1. Reset network settings.
2. reset all settings
3. reboot my router.
4. increased the lease time of my router.

Am using ios 13.6 as now.