Why is Next-Auth creating two tokens in the browser, neither of which are the JWT?

[Ryan-FLT]

I am using Next Auth with only 1 provider, Azure AD. Usually, Next-Auth will create a session token (__Secure-next-auth.session-token) in the browser that I can send to my backend and decode for authentication.

Recently this token disappeared and in its place there are now two tokens:

__Secure-next-auth.session-token.0
__Secure-next-auth.session-token.1

Neither of these tokens are properly formatted JWTs that my backend can decode.

What are these new tokens and how can I get the old one back?

route.ts

import NextAuth from "next-auth"
import AzureADProvider from "next-auth/providers/azure-ad"
    
const providers = [
    AzureADProvider({
        clientId: process.env.AZURE_AD_CLIENT_ID || '',
        clientSecret: process.env.AZURE_AD_CLIENT_SECRET || '',
        tenantId: process.env.AZURE_AD_TENANT_ID,
    }),

]

export const authOptions = {
    providers: providers
}

const handler = NextAuth(authOptions)

export { handler as GET, handler as POST }