Using OAuth or OAuth impersonation makes no difference.
Logged as the same user, admin on both confluence and JIRA.
No matter which gadget I try I get one of the error messages below
Filters are set to be visible to any logged in user
The selected filter filter-10303 has an error: Field 'component' does not exist or this field cannot be viewed by anonymous users..The selected filter filter-10303 has an error: Field 'component' does not exist or this field cannot be viewed by anonymous users..The selected filter filter-10303 has an error: Field 'component' does not exist or this field cannot be viewed by anonymous users..
or
Client must be authenticated to access this resource