Samsung A7 (2017) displays Internet may not be available with TP-Link Router WiFi

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SVK

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12,170
Location
India
ISP
Jio Fiber, Airtel 5G
I am facing issue while trying to connect Samsung A7 (2017) mobile with WiFi from TP-Link Router (TL-WR840N). When WiFi is connected, it displays "internet may not be available".
But same mobile is able to connect with Airtel's Huawei 4G Dongle.
With WiFi Analyser app, I got below details for both WiFi connection. Except Security settings, all other parameters are almost same.
TP-Link 2.4 GHz CH10 WPS-WPA2 WiFi 802.11n
Huawei 2.4 GHz CH11 WPA2 WiFi 802.11n


I tried solution like removing and adding WiFi again, factory reset mobile, setting Static DHCP IP. But nothing worked, and same issue is observed.
Internet was working on same mobile few weeks ago with same TP-Link Router, but when I checked 2 days back, I found this issue. Not sure what could have changed in Router in last 10-15 days.
All other devices like Laptop, Tablet, FireTV Stick and other Mobiles are not having this issue and able to access Internet with same TP-Link Router.
Anything else I need to try?
 

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