Blazor PageTitle tag not working after migrating to .NET Core 6

I tried to configure the page title in my Blazor Server application but, unfortunatelly, the tag <PageTitle> not working. This project was started before Microsoft release .NET Core 6 and, after that, I migrated my application to this version.

There aren't errors in compiling or running.

Example page:

@page "/page"<PageTitle>My page title</PageTitle>...