Random Weird WiFi connection issue

Messages
50
Location
Rohtak
ISP
Jio Fiber
So, I have this issue where my mobile or other mobiles in my home don't connect to one band if router haven't been restarted for few days (usually 4-5 days).

Like my current router uptime is 6 days and my phone can connect to 2.4Ghz WiFi but not to 5Ghz which was working yesterday. It will only show "connecting".

Anyone else face this issue?
 

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