Short Assignment to check CORS issue + deployment on Azure

Note: only those who are full stack developer having experience in .NET core + Angular (Latest) + Azure I have everything up and running my project is completed right now I am facing a minor issue and which is very random when I check the console it says CORS issue but the CORS is enabled and listed in azure site. I need someone to check and fix (the issue is very random it only appears with few customers ) do not know why ? I have few other points to do as well but I will start them later. you need to also check the codebase.