Vendor Key is inactive: Infinite Campus Grade Passback

[MrReed]

Are any other Infinite Campus users experiencing issues with grade passback?

Several of our jobs are randomly failing with this error:  Vendor Key or Secret not found or Vendor Key is inactive

Retrying the failed sync job will most of the time allow it to complete successfully. 

The failures seem to be random and unpredictable.

(We have a ticket in with the Canvas SIS team, but are waiting for a response.)