I Face Login Failure With Clash Royale Account on My Current Phone

I have been unable to log into my Clash Royale account on my current phone, despite having no issues accessing the same account from a different device. This problem started recently, and it happens only on this specific phone. I am not using any VPN, proxy, or third-party software, so there is no reason for the game to block my connection.

Whenever I try to log in, the game simply fails to load my account. I have checked every possible setting, cleared the cache, reinstalled the app, and even verified my internet connection. None of these steps have fixed the problem. I also searched online and found no official solution from Supercell.

I expect Supercell to review my account and device compatibility, identify why the login fails only on this phone, and provide a fix so I can play without having to switch devices every time. This issue needs urgent attention.