We are maintaining an add-in that is adding a custom actions to following locations: Microsoft.SharePoint.ListEdit, Microsoft.SharePoint.ContentTypeSettings, Microsoft.SharePoint.ContentTypeTemplateSettings.
The actions are displayed as links in Settings section.
It was working for some years but we noticed recently that the actions are not shown on Site Content Type Settings (Classic).
They are shown correctly in other expected locations: on Library Settings page and Content Type Settings as accessed from Library Settings (for Content Types copies) and even in Site Content Type Settings on Content Type Hub site.
We haven't done any changes in the add-in that would explain the problem we see. Does any one know what could happen or if there is a workaround to that?
