Issue Summary

Setting dashboard item configuration through API can lead to inconsistent settings being stored, causing errors on later attempts to manipulate the dashboard.

Steps to Reproduce

1. Set a dashboard item's properties using https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-dashboards/#api-rest-api-3-dashboard-dashboardid-items-itemid-properties-propertykey-put , to something other than single-level object with strings for keys and values.
2. Attempt to delete the dashboard

Expected Results

The dashboard is deleted.

Actual Results

A 500 is returned, and internally a JSON decoding error is logged.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available