After cellphone authentication, "session expired/changed"?

After cellphone authentication, “session expired/changed” in Web not mobile??

I’ve hit that “session changed/expired” after phone auth when my web flow redirected too early. What fixed it: complete the login action before any page navigation, avoid logging the user in twice, and don’t run “log out” anywhere on page load. Also check cookie domain/SameSite settings, clear caches, and test in a fresh browser profile—extension or time-skew issues can trigger it.

Since it is a sign-up page, I have to log in after phone authenticating.Also check cookie domain/SameSite settings, clear caches, and test in a fresh browser profile… I don’t know how to do it…

Is it bubble’s problem???
Do I have to upgrade pay plan in Bubble?

Can I test Upgraded pay plan for a week in Bubble???