Tableau API - There was a problem querying the job

PLEASE HELP. - Im using the Cloud Tableau API

I have successfully managed to POST a refresh on a datasource with.

https://us-east-1.online.tableau.com/api/3.9/sites/[site_id]/datasource/[datasource_id]/refresh

So far so good, this successfully comes back with a 202 response and looking at the contents, there is the job number.

Next if one queries the /job/ list endpoint, again all good, there is the job listed :-)

However, when you then do /job/[job_id] You get a 400 and the message - There was a problem querying the job [job_id] :-0

Is this a bug??

Thanks

I don't think I'll get a response because I think there is something wrong with Tableau bridge no-one wants to draw attention to ...