HI @jazzepi Welcome to Auth0 community.
If you are redirecting user to auth0 /logout endpoint then Auth0 will definitely invalidate user session on auth0 side. However we need to understand which session you are talking about. There can be three sessions as described here Session Layers
A HAR file of network requests would also help to troubleshoot Generate and Analyze HAR Files (Remember to scrub any confidential information such as username/email, owd and client secrets from the HAR file before uploading)