On specific projects when a child task is deleted from a project task the read-only fields, for example, the state field does not go back to read-only.
Kingston Patch 4
The user does not have the it_project_manager role hence he was not able to see those fields. Created custom ACLs where only it_project_manager can create and edit projects.
Create another pm.project.state write ACL where they can specify "it_project_user" as the required role so everyone who has that role will be able to ONLY change the state field.