Can't limit CPU usage on ASP.NET Core IIS application pool

I have several ASP.NET Core web applications on our web server. They work in IIS. Each in a separate application pool. Everything is good. But if I set CPU action at KillW3wp and Limit to any value (for example, 50 000 (50%)), I start getting the 502 error. How can I limit the CPU usage for the ASP.NET Core web app in the IIS? Thanks!