Odoo keeps disconnecting on one PC, but works fine on mobile hotspot

Hi everyone,

I'm having a recurring Odoo connection issue with a coworker's laptop.

He connects through a TP-Link router that shares the same company internet connection used by everyone else. However, he's the only one experiencing issues with Odoo.

Odoo loads normally, but randomly displays "Connection lost. Trying to reconnect…". When connected through a mobile hotspot, everything works perfectly.

What we've tried:

• Cleared DNS cache and tested incognito mode.
• Checked DNS, proxy, VPN, and firewall-related connectivity.
• Initially found two default gateways. Removed an incorrect route, which temporarily fixed the issue.
• Confirmed that DNS and HTTPS connectivity (port 443) work, even when the issue reappears.
• Disabled Wi-Fi adapter power-saving settings.
• Checked Wi-Fi drivers and Windows network logs.
• Investigated WebSocket connections in Chrome DevTools, but haven't identified a clear failure.

The issue keeps coming back despite these changes.

Laptop: HP, Windows 11, Realtek Wi-Fi 6 adapter.

Has anyone experienced something similar or have suggestions on what to check next?

Any help would be greatly appreciated!