Get custom field configurations fails with 403

Hi community,

Our app uses Get custom field configurations API.
The API responds 403 error with the message “You must have the browse project permission to view this project.” on one of our customer’s sites.
Almost all sites work properly with the API. So, I think it’s not related to manifest, but Jira config.

Request code is,

api.asApp().requestJira(route`/rest/api/2/app/field/${fieldId}/context/configuration?projectKeyOrId=${projectId}&issueTypeId=${issueTypeId}`)

The “atlassian-addons-project-access” project role is in the Browse Projects Permission.
Could someone tell me why it happens? Is there Forge specific permission mechanism?