Exchanging PIN for JWT Token

Following the docs at https://developer.plex.tv/pms/#section/API-Info/Authenticating-with-Plex I get everything going fine until I hit the last step and try exchanging my PIN for a JWT Token

Using the link page at https://plex.tv/link/?pin= and polling the Pin ID to find out when it’s been linked I end up with what looks like a Legacy authToken in the JSON

I still wanna use the JWT so I try exchanging my PIN for a JWT via a GET https://clients.plex.tv/api/v2/pins/?deviceJWT= BUT while it says in the docs that I will get a new JWT authToken I have exactly the same authToken that was visible during the polling.

A JWT should start with eyJ but my authToken(s) don’t

Checking my Plex server with the Token shows that it appears to work (BUT it’s not a JWT!!!)