[keycloak-user] Mappers with token exchange

Hello, We're using token exchange to enable logins for social media provider users, using their respective native apps. So the tokens are obtained via official SDKs/apps, then sent our backend to be exchanged for a keycloak token, which is then used throughout. The problem is, attribute importers don't seem to be running for tokens that are exchanged with this method. We have a mapper to export the user's facebook id ("Social Profile JSON Field Path" set to "id") to custom user attribute, but it doesn't seem to be working. (except of course when I login "properly" and not use the token exchange process at all) Are there any settings that I'm missing? Recommendations? (Keycloak 5.0. Same with 4.1) Thanks Kemal