Again, sorry for the delay - real life keeps butting in.
Unfortunately, I don’t know where to go with this one. Usually JsonReader errors are related to a communications issue with the destination provider.
If the issue is still happening for you, would you consider updating to the recently released 2.0.3.11 canary version? So far this version seems stable and has resolved a number of outstanding issues while keeping performance at 2.0.3.3 beta levels.