You try to sign in.
The password is correct.
But the website sends you back to the login page again.
Or the session suddenly expires.
Sometimes the page refuses to load properly.
What makes it confusing is that the same account works on another device.
Same login.
Same internet.
Yet one device keeps failing.
In many cases, the problem isn’t the account.
It is the browser cache or stored cookies.
How Cache and Cookies Affect Logins
Websites store small pieces of data inside your browser.
These include cache files and cookies that help maintain login sessions.
This system allows websites to remember your authentication status.
But when those stored files become outdated or corrupted, the browser may send incorrect information to the server.
- Expired session cookies
- Outdated cached login pages
- Conflicting authentication data
- Old security tokens
When this happens, the login process may fail even though the credentials are correct.
Why the Problem Appears on Only One Device
Cache and cookies are stored locally on each device.
This means different devices may hold different session data.
If one browser contains outdated authentication files, the website may reject the session.
Meanwhile, another device with clean data logs in normally.
The account is valid.
The stored browser data is not.
Signs Cache or Cookies Are Causing the Issue
- The login page keeps refreshing
- The session expires immediately after signing in
- The site works on another browser or device
- Logging in through private browsing works
These signals usually indicate a browser data conflict.
What Usually Fixes It
- Clear the browser cache
- Delete stored cookies for the site
- Restart the browser
- Try logging in again after clearing data
Once the browser sends fresh session data, login usually works again.
If a website works on other devices but fails on one browser,
the account usually isn’t the problem.
Old cache or cookies are likely interfering with the login session.