LTI 1.3 private key reset on each tool edit

Check current key exposed by Moodle by opening in browser: <moodle_domain>/mod/lti/certs.php Note the value for kid in the JSON content Installing a new LTI 1.3 tool should not change the site key; let's verify by installing ZTest tool 1.3 as a site external tool (or you can just open it and save without change if it is already configured) Log in as an administrator Navigate to Site Administration > Plugins > External tool > Manage tools Click on configure a tool manually Fill the form as follow: Tool name: ZTest 1.3 Tool url: https://ztest.cengage.info/ztest/lti LTI Version: LTI 1.3 Public key: copy the value from https://ztest.cengage.info/ztest/ LTI 1.3 Connect info tab Initiate Login URI: https://ztest.cengage.info/ztest/ws/lti/startlaunch?lti13=true&client_id=CLIENT_ID_HERE&platform=moodle Redirect URI: https://ztest.cengage.info/ztest/lti Click on ‘Show more’ Check Content-Item message Change the 'Privacy' setting ‘Accept grades from the tool’ to 'Delegate to Teacher'. In Services, IMS LTI Assignment and Grade Services, choose Use this service for grade and column mgmt Save changes. Once the tool is created, open the cert page again <moodle_domain>/mod/lti/certs.php Verify the kid has not changed