Network sharing not working over WiFi but works over wired.

Hello,

I have some laptops and computers in my office.

Suddenly out of the blue today, network sharing has stopped working on WiFi devices but is working fine on wired devices.

Why is this happening?
I didn't change any setting.

I tried restarting the router and laptops multiple times but nothing worked.

The wired and wireless connection use the same default gateway with a static IP. IP is different but the default gateway is the same (10.0.0.1)

Why did this happen all of a sudden?
And why is wired connection working but wireless is not?

Edit:
After further testing, even wired to WiFi and WiFi to wired network sharing is working.
But not WiFi to WiFi.